Dissertations / Theses on the topic 'Vestibular'
To see the other types of publications on this topic, follow the link: Vestibular.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Vestibular.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Sato, Silvana Rodrigues de Souza. "Concurso vestibular." Florianópolis, SC, 2011. http://repositorio.ufsc.br/xmlui/handle/123456789/95324.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Educação, Programa de Pós-Graduação em Educação, Florianópolis, 2011Made available in DSpace on 2012-10-26T00:12:19Z (GMT). No. of bitstreams: 1 297821.pdf: 1807285 bytes, checksum: fe813072e5202695d644bba4a0c38734 (MD5)
A partir deste estudo propomo-nos analisar o concurso vestibular como dispositivo meritocrático de ingresso na Universidade Federal de Santa Catarina. A base empírica é constituída por uma amostra de universitários das primeiras fases de todos os seus cursos, aprovados no vestibular do ano de 2010. Para alcançar esse objetivo, buscamos compreender diferentes exames para acessar os níveis escolares, principalmente, os referentes ao ensino superior, compomos o atual perfil socioeconômico dos ingressantes da universidade federal catarinense e estudamos o modo como a aprovação ou reprovação no vestibular é explicada e sentida, a partir do entendimento dos candidatos aprovados no concurso do ano de 2010. Além disso, realizamos um levantamento das pesquisas sobre a temática e empreendemos estudos sobre as diferentes denominações atribuídas aos exames, juntamente com a análise de orientações oficiais que regulamentaram e/ou estão em vigor na legislação brasileira. Aprofundamos estudos em algumas teorias sociológicas contemporâneas de Michel Foucault, Pierre Bourdieu, Jean-Claude Passeron e François Dubet, desejando entender a importância que os dispositivos de seleção e de classificação assumem no desenvolvimento das sociedades modernas. Identificamos os significados dos termos vestibular, concurso e exame, vocábulos de objetivos diferentes, embora inter-relacionados. A tabulação e a análise das informações contidas nos questionários aplicados aos acadêmicos nos levaram a concluir que a herança familiar, em todas as suas dimensões e com uma alta reconversão de capitais, tem pesado a favor dos jovens vindos das camadas sociais mais favorecidas. Fica evidente que as famílias utilizam variadas estratégias para que seus descendentes construam trajetórias escolares bem sucedidas. Os percursos escolares dos calouros são marcados por iniciativas que fizeram a diferença no momento do ritual de passagem do ensino médio para o ensino superior. A se destacar a respeito da expressiva maioria: cursou educação infantil; migrou do ensino fundamental público para o ensino médio privado; disponibilizou de mais de um turno para a preparação para o vestibular (85%); não trabalhava no começo dos estudos acadêmicos (71%) e mantinha a perspectiva de prosseguimento dos estudos em nível de pós-graduação. O mérito escolar é legitimado pela maioria dos calouros, que atribui o sucesso no concurso vestibular ao esforço de cada candidato.
2
Taylor, Rachael Louise. "Vestibular Evoked Myogenic Potential Characteristics in Common Vestibular Disorders." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/15856.
Full textAbstract:
Intense sound and vibration evokes small reflexes from the neck and eye muscles, reflecting activation of vestibular-otolith receptors. These responses provide the basis for two clinical tests of balance function, referred to as cervical- and ocular- vestibular evoked myogenic potentials (cVEMPs and oVEMPs). As relatively new tests, their diagnostic role has not been fully explored. The primary aim of this thesis was to identify test and stimulus combinations that improve the sensitivity and specificity of VEMP testing, whilst differentiating between different causes of vertigo and imbalance. Patients with Ménière’s disease, vestibular migraine, superior canal dehiscence, vestibular schwannoma, and vestibular neuritis were recruited from neurology outpatient clinics at the Royal Prince Alfred Hospital in Sydney, Australia from 2009-2015. Each study identified specific stimulus/VEMP combinations that enhanced the sensitivity of VEMP testing, as well as revealing patterns of otolith dysfunction that characterised each disorder. Ménière’s disease was characterised by impaired saccular and largely preserved utricular function, whereas in vestibular migraine otolith function was usually preserved and symmetrical. Superior canal dehiscence was unique with its high frequency augmentation effects and prolonged oVEMP latencies to skull-tap stimulation. For vestibular schwannoma larger than 14 mm, impaired function of both otolith organs was common. Abnormal utricular, but spared saccular function, was most often observed in patients with vestibular neuritis. The findings of this thesis provide new insight into how test parameters can be manipulated to enhance the sensitivity of VEMP testing in the clinical setting. The different patterns of saccular and utricular involvement contribute significantly to the clinician’s ability to separate different vestibular disorders.
3
Hijano, Esqué Rafael. "Valor diagnóstico de los potenciales vestibulares evocados miogénicos (VEMPs) en el schwannoma vestibular." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/325410.
Full textAbstract:
Introducción: El schwannoma vestibular (SV) es un tumor benigno con origen en el VIII par craneal. La prueba diagnóstica de referencia del SV es la resonancia magnética (RM), si bien existen una serie de pruebas de funcionalidad cócleo-vestibular que, junto con el grado de sospecha dado por determinadas manifestaciones clínicas, pueden poner sobre la pista del SV. Entre éstas pruebas se encuentran los potenciales evocados vestibulares miogénicos de registro cervical (cVEMPs) que ha ganado popularidad en los últimos años como prueba de funcionalidad del sáculo y del nervio vestibular inferior. Los objetivos del presente estudio son determinar cuál es la bondad diagnóstica de los cVEMPs , establecer qué variables demográficas, clínicas (síntomas, signos, inicio) y de resultados en pruebas otoneurológicas (audiometría, pruebas vestibulares calóricas, potenciales auditivos de tronco –PEATC-, cVEMPs) pueden predecir tamaño, grado de penetración y localización tumorales (fundamentales para establecer la modalidad terapéutica adecuada y para la valoración de la funcionalidad auditivo-vestibular residual que, sin duda, marcan la calidad de vida de estos pacientes). Material y métodos: Para establecer la bondad diagnóstica de los cVEMPs se analizó retrospectivamente una cohorte de 585 pacientes visitados consecutivamente en una consulta de otoneurología, en un período de 4 años, con síntomas-signos auditivo-vestibulares (93 con SV, 492 sin SV). A todos ellos se les realizó cVEMPs y RM. Se calculó sensibilidad, especificidad, valores predictivos y razones de verosimilitud; así mismo se usó una cohorte retrospectiva de 157 pacientes con diagnóstico confirmado de SV en el mismo hospital en un período de 10 años, recogiendo datos demográficos, síntomas (hipoacusia, acúfenos, desequilibrio, vértigo, signos no otológicos) y resultados en audiometría, pruebas calóricas, PEATC y cVEMPs, para realizar análisis multivariado referente a la predicción de tamaño, localización –intra o extracanalicular- y grado de penetración en el conducto auditivo interno (CAI) del SV. Resultados: La prueba índice usada en la serie (cVEMPs) para el diagnóstico de SV, cuando fue comparada con la prueba de referencia (RM CAI), presentó una sensibilidad de 81.72% y una especificidad del 37.60%. Mucho más bajas fueron la sensibilidad (58%) y especificidad (52%) de las pruebas vestibulares calóricas. El valor predictivo negativo de los cVEMPs fue del 92%. La afectación de las frecuencias bajas en la audiometría, una alteración del intervalo III-V en el lado sano en los PEATC y presentar signos no otológicos y desequilibrio fueron las variables predictivas que se relacionaron significativamente con el tamaño del SV, en un modelo de regresión lineal múltiple. Los pacientes con afectación en la audiometría de frecuencias graves y penetración del SV más allá de la mitad del CAI tuvieron más probabilidad de presentar SV extracanaliculares. La pérdida en la audiometría de > 40 dB se mostró como la única variable explicativa del mayor grado de penetración de los SV en el CAI. Conclusiones: Los cVEMPs no son una buena herramienta diagnóstica de detección, debido a su baja especificidad, pero sí de exclusión dado su alto valor predictivo negativo. Presentar desequilibrio, signos no otológicos, afectación de las frecuencias bajas en la audiometría y un incremento en el intervalo III-V del lado sano en los PEATC son las variables que predicen mejor el tamaño en mm de los SV. Los cVEMPs no son una buena herramienta para discernir entre un tumor intra o extracanalicular, ni tampoco el grado de penetración tumoral en el CAI.Introduction: Vestibular schwannoma (VS) is a benign tumor arising from the eighth cranial nerve. The current gold standard for diagnosing SV is magnetic resonance imaging (MRI), although many tests which evaluate cochleovestibular functionality, together with the degree of suspicion given by certain clinical manifestations, can put on the track of the diagnostic of VS. These tests include cervical vestibular evoked myogenic potentials (cVEMPs), that has gained popularity in recent years as a diagnostic tool to evaluate the saccule and the inferior vestibular nerve functionality. The aims of this study are to determine what is the diagnostic accuracy of the cVEMPs, to establish which demographic, clinical (symptoms, signs, onset) and otoneurological tests (audiometry, caloric tests, auditory brainstem potentials -ABR-, cVEMPs) variables can predict size, degree of tumor penetration and location (they are fundamental for establishing the proper therapeutic modality and for the assessment of the residual auditory-vestibular functionality, which undoubtedly predict the quality of life of these patients). Material and methods: A cohort of 585 patients visited consecutively over a period of 4 years, in an otoneurology clinic, suffering from audiovestibular signs and symptoms (93 with VS, 492 without VS) was retrospectively analyzed to establish the diagnostic accuracy of cVEMPs. cVEMPs and MRI was performed in all of them. Sensitivity, specificity, predictive values, and likelihood ratios were calculated; a retrospective cohort of 157 patients with confirmed diagnosis of VS, at the same hospital in a period of 10 years, was also analyzed, collecting demographic data, symptoms (hearing loss, tinnitus, vertigo, imbalance non-otological signs) and results in audiometry, caloric testing, ABR and cVEMPs in order to perform a multivariate analysis to predict the size, location - intra vs. extracanalicular- and degree of penetration into the internal auditory canal (IAC) of the VS. Results: The index test for the diagnosis of SV used in this series (cVEMPs) -when compared to the reference standard test (MRI) - presented a sensitivity of 81.72% and a specificity of 37.60%. The caloric test showed both low sensitivity (58%) and specificity (52%). The negative predictive value of cVEMPs was 92%. The involvement of low frequencies on audiometry, an alteration of the III-V interval in the ipsilateral side in the ABR, non-otological signs and imbalance were predictive variables that were significantly related to the size of the SV in a multiple linear regression model. Patients with involvement of low-frequencies in the audiometric test and penetration of the VS beyond half of the IAC were more likely to have an extracanalicular VS. A loss > 40 dB in the audiometry was established as the single explanatory variable of a higher penetration degree of VS in the IAC. Conclusions: cVEMPs are not a good diagnostic detection tool, due to its low specificity. Conversely, given its high negative predictive value, they are a good diagnostic tool of exclusion. Having imbalance, non-otological signs, involvement of low frequencies in the audiometry and an increased III-V interval in the healthy side in ABR are the variables which best predict the size of VS in millimeters. cVEMPs are not a good tool to discern between intracanalicular and extracanalicular tumors, nor the degree of tumor penetration in the IAC.
4
Silva, André Luis dos Santos. "EL EQUILIBRIO, LA MARCHA Y LA EFICACIA DE UM TRATAMIENTO KINESITERAPICO EN ANCIANOS PORTADORES DE DESÓRDENES VESTIBULARES." Centro Universitário de Caratinga, 2005. http://bibliotecadigital.unec.edu.br/bdtdunec/tde_busca/arquivo.php?codArquivo=74.
Full textAbstract:
lt;p align="justify"gt;Propuesta: El objectivo de esta investigación fue el de determinar el significado de un tratamiento kinesiterápico a través de un programa personalizado de rehabilitación vestibular en el control de los trastornos vestibulares con la asociación de la reeducación del equilíbrio y de la marcha en la población anciana. Metodología: La pesquisa desarrollada fue analítica, caracterizada como un estudio clínico prospectivo casi experimental con el grupo-control. Se optó por la aplicación de un control diario el cúal los sujetos rellenaron por todo el período de la investigación, demostrando así una característica longitudinal al trabajo. El tratamiento estadístico fue constituido de estadística descriptiva y la inferencial, a través de la cúal se realizó la aplicación de los testes de hipótesis con test t de Student y el Chi-cuadrado que constituyeron la base del proceso comparativo de los valores medios y distribuciones de frecuencias calculadas, de acuerdo a las variables descritas consideradas. El nivel de significancia fue plt;0,05. Sujetos: de un total de 235 pacientes, fueron seleccionados 62 (55 de sexo femenino y 7 del sexo masculino), no institucionalizados, en el Hospital Publico de Buenos Aires. El grupo seleccionado quedo constituido por sujetos con disfunción vestibular, con edad entre 58 a 87 años (aproximado de 67 a 45 años; DP: 6,34), siendo que 31 quedarón en el grupo experimental y 31 en el grupo control. Resultados: el tratamiento kinesitertapico propuesto debe ser aceptado como instrumento de alteración significativa en el cuadro de los pacientes sometidos. Los resultados combinados denotarón que la respuesta clínica y la auto evaluación fueron concordantes en la percepción de mejora del grupo sometido al tratamiento experimental. Hubo diferencias estadísticamente significativas a lo largo de tres meses para los parámetros analisados. Conclusiones: Los resultados de este estudio indican que programas personalizados y supervisados para el control de las vestibulopatias sin eficazes y su oferta debería ser considerada rutineramente en servicios publicos y privados.lt;/pgt;Proposal: The objective of this investigation was the one to determine the meaning of a kinesitherapy treatment through a customized program in the control of the vestibular disorders with the association of the vestibular rehabilitation and reeducation of the balance and the gait in the elderly. Methodology: The developed search analytical was characterized as quasi experimental design a prospective clinical study with the group-control. It was decided on the application of a daily control which the subjects filled up by all the period of the investigation, demonstrating therefore a longitudinal characteristic to the work. The statistical treatment was constituted of descriptive statistic and the inferencial, through which it was made the application of the tests of hypothesis with test t of Student and the Chi-square that constituted the base of the comparative process of the values average and calculated frequency allocations, according to the described variables considered. The significance level was plt;0,05. Subjects: of a total of 235 patients, noninstitutionalized ones were selected 62 (55 female and 7 male), in the publish hospital of Buenos Aires. The selected group was constituted by subjects with vestibular disorders, with age between 58 to 87 years (approximated of 67 to 45 years; SD 6,34), being that 31 in experimental group and 31 in the control group. Outcomes: the kinesitherapy treatment proposed must be accepted like instrument of significant alteration in the vestibulopath patients. The combined results exposes that clinical answer and the self-evaluation were concordant in the perception of improvement of the group submited of the experimental treatment. There were statistically significant differences throughout three months for the analized parameters. Conclusions: The outcomes of this study indicate that supervisioned physical therapy programs for the control of vertigo is considered efficacy and its supply would be considered in public and private services.
5
Nigmatullina, Yuliya. "Visual-vestibular interactions." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25086.
Full textAbstract:
Following repeated exposure to vestibular stimulation, the vestibular response as measured by the vestibular-ocular reflex and perception of self-motion is reduced. Similarly, prolonged viewing of a visual motion stimulus results in a reduced sensitivity to the adapting motion stimulus. These phenomena of visual-vestibular desensitisation are utilised as part of treatment of patients with peripheral or central vestibular disorders. Patients typically receive vestibular rehabilitation therapy, which involves exposure to repeated visual and/or vestibular stimulation. Whilst the effects of vestibular rehabilitation at the behavioural level have been widely studied, the neural mechanism of how it works is unclear. In this thesis, asymptomatic subjects were recruited to investigate the neural mechanisms underlying visual and vestibular desensitisation. In the first study, the effect of long term vestibular training was investigated on the vestibular psychophysical measures and on the structure of the brain. To this aim, a group of high level dancers and a group of non-dancers were recruited with both groups undergoing a battery of vestibular tests and neuroimaging brain scans. Compared to controls, dancers showed a significant reduction in both vestibular ocularmotor response and perception of self-motion. Moreover, in controls a significant correlation was found between ocularmotor and perceptual measures, which was absent in dancers. This uncoupling of the vestibular measures was also seen at the neuroanatomical level in the locus of the vestibular-cerebellum, as revealed by voxel based morphometry (VBM) analysis of the dancers' brain grey matter. Using diffusion tensor imaging (DTI), a widespread cortical white matter (WM) network was found to correlate with vestibular perception in the control group only. The findings suggest that in dancers, a cerebellar gating of perceptual signals to cortical regions takes place that may mediate the training-related resistance to vertigo. The second study of the thesis looked at the effect of a single prolonged exposure to unilateral visual motion stimulus in healthy untrained subjects. This involved using transcranial magnetic stimulation (TMS) induced phosphenes to assess early visual cortical excitability. Following visual motion adaptation, excitability of visual cortex (V1) was significantly reduced when viewing motion in the adapted direction and significantly increased when viewing motion in the non-adapted direction. This suggests that reciprocal inhibition takes place between oppositely tuned directionally selective neurones in V1 to facilitate motion perception. The visual cortical excitability returned to its prior-adaptation state after five minutes suggesting that a single exposure to visual motion stimulus is not sufficient to cause a long-term adaptive effect. The final study of the thesis investigated potential neural mechanisms involved in suppressing visual symptom of oscillopsia (perception of the world oscillating/moving), a potentially distressing condition that occurs in some vestibular and ocularmotor disorders. The study recruited participants with nystagmus and they were divided into two groups according to their experience of oscillopsia: symptomatic (with oscillopsia) and asymptomatic (no oscillopsia). TMS induced phosphenes were used to assess (1) whether visual cortical spatial updating takes place according to the eye position and (2) whether modulation of visual cortical excitability takes place during nystagmus. In the asymptomatic group only, evidence for both visual cortical updating and modulation of visual cortical excitability was found, which was absent in the symptomatic group. The findings suggest that spatial updating of eye position and changes in visual cortical excitability are implicated in the suppression of oscillopsia. In particular, the work presented in the thesis provides neuroanatomical imaging basis for vestibular adaptation and provides evidence for a direct cortical involvement in visual motion adaptation. Both of these mechanisms are likely to be involved in the clinical recovery process of patients with vestibular and ocularmotor disorders. Greater understanding of the neural mechanisms involved in long lasting visual-vestibular desensitisation will bring us closer to developing personalised treatments that are more effective in improving symptoms of patients with visuo-vestibular disorders.
6
Junkes, Terezinha Kuhn. "Redação no vestibular." reponame:Repositório Institucional da UFSC, 1987. https://repositorio.ufsc.br/handle/123456789/106282.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Florianópolis, 1987.Made available in DSpace on 2013-12-05T19:58:38Z (GMT). No. of bitstreams: 1 98673.pdf: 3478366 bytes, checksum: 223123bde5e75936fa63acfeeb272dc0 (MD5) Previous issue date: 1987
A partir da dificuldade de expressão verbal constatada nas redações de alunos de 2o. grau e dos vestibulandos, a presente dissertação objetiva estudar o assunto. Analisa sobretudo, os aspectos da coesão e da coerência textuais, dando um enfoque teórico, conforme vários autores, como Beugrande e Dressler, Halliday e Hasan, Marcuschi, Schmidt, centralizando a discussão em torno de elementos substitutivos. Numa visão micro e macroestrutural, analisam-se os problemas de remissão: as relações anafóricas e a referência exofórica - dêitica, além de serem trabalhados os elementos não contextualizados. O corpus para estudo prático dessas questões é constituído por 281 redações do vestibular de 1986 da UFSC. Constata-se baixo número de redações fluentes, confirmando tais resultados a problemática do ensino de redação na grande maioria das escolas brasileiras, tanto da rede particular quanto da oficial, problemática agravada ainda mais nos estudantes de nível sócio-econômico menos favorecido e nos que fazem o 2o. grau supletivo. A origem dos problemas enfrentados pelos alunos pode ser detectada no uso inadequado de gramáticas normativas e na organização do conteúdo didático de alguns livros-texto, além das técnicas ineficientes de manuais próprios de redação. Conclui-se que a solução para a problemática só será viável quando houver mudanças de princípios e métodos, em relação ao ensino da redação, principalmente por parte dos autores de livros didáticos e dos professores.
7
Akin, Faith W. "Vestibular Grand Rounds." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/2445.
Full text
8
Akin, Faith W. "Bilateral Vestibular Loss." Digital Commons @ East Tennessee State University, 1997. https://dc.etsu.edu/etsu-works/2459.
Full text
9
Akin, Faith W. "Vestibular Grand Rounds." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etsu-works/2440.
Full text
10
Akin, Faith W. "Vestibular Grand Rounds." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etsu-works/2449.
Full text
11
Fox, Richard. "Vestibular schwannoma size and vestibular function as assessed by video head impulse testing and vestibular evoked myogenic potentials." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/27519.
Full textAbstract:
Introduction
Vestibular schwannoma (VS) is a benign tumour of the vestibular nerve. Studies investigating size versus vestibular function have measured largest axial diameter of the tumour mass and utilized a range of vestibular function tests (VFT). Understanding this relationship has the potential to enhance the clinical management of VS in patients contraindicated for MRI, and may have utility in screening/monitoring of VS. The aim of the project was to investigate the relationship between VS size and VFT.
Method
A retrospective review of VFTs was conducted in a tertiary referral center (2010 – 2020). VFTs included air and bone-conducted cervical and ocular vestibular evoked myogenic potentials (AC & BC cVEMPs & oVEMPs) and multiplanar video head impulse testing (vHIT). VS size was measured by region of interest volumetric calculation from axial MRI.
Results
One hundred and thirty-two patients were assessed. The median VS size was 0.47ml (IQR= 0.15-1.37ml). vHIT saccade metrics were the most sensitive test to detect abnormal vestibular function in VS, increasing vHIT sensitivity by 50% and vHIT detected abnormal vestibular function in 100% of patients.
Increasing VS size, across patients, correlated with a higher; VEMP asymmetry ratio, horizontal semicircular canal (HSC) and posterior semicircular canal (PSC) saccade prevalence and 1st saccade amplitude, and a lower HSC and PSC gain and 1st saccade latency.
Multivariate linear regression identified two metrics that explained a change in VS size: posterior canal gain (rc=-4.49 p=0.01) and BC oVEMP amplitude asymmetry ratio (rc= 1.36 p= 0.036). A significant relationship was seen between VS size and the number of test abnormalities (rc= 0.221, p<0.001).
Conclusions
VHIT and VEMPs are highly sensitive to detect abnormal vestibular function in VS when used in combination. Saccade metrics increase vHIT sensitivity but the potential to select patients with unilateral sensory neural hearing loss will require further research to establish the sensitivity and specificity. A difference in tumour size across patients is explained by a difference in two VFT metrics (BC oVEMP AR and PSC gain). This relationship is likely multifactorial. Larger retrospective or prospective longitudinal studies are required to establish if additional metrics explain a change in VS size.
12
Freitas, Renan Luiz de. "Redação de vestibular: sujeitos e ensino em pré-vestibulares noturnos de Recife." Universidade Católica de Pernambuco, 2006. http://www.unicap.br/tede//tde_busca/arquivo.php?codArquivo=15.
Full textAbstract:
Esta pesquisa investiga o ensino de produção de texto em cursos pré-vestibulares noturnos de três unidades particulares de ensino do Recife. O objetivo geral é confrontar o ensino de redação com a heterogeneidade dos sujeitos que procuram esses cursos. Os específicos são, primeiro, comparar o ensino nas três unidades e, segundo, observar se tal ensino favorece a que os sujeitos possam produzir textos competitivos, nos quais também se apresentem como autores de sua produção (PILAR, 2005, POSSENTI, 1999; BRONCKART, 1999). Trata-se de uma pesquisa de campo e documental. Das unidades de ensino, recolhemos dois tipos de documentos: as fichas de matrícula dos sujeitos e as fichas de aula, sobre os quais será desenvolvida nossa análise. Das fichas de matrícula, colhemos traços possíveis do perfil socioeconômico dos sujeitos, a fim de observar se o ensino de redação poderia reconhecer a heterogeneidade de perfis que chegam à sala de aula. Das fichas de aula, buscamos observar se o método de ensino ali representado pelos conteúdos e encaminhamentos poderia subsidiar o aluno na produção de um texto compatível com as expectativas das comissões de vestibular e se possibilitariam que os sujeitos se inscrevessem como autores de seus textos no sentido do que defende Pilar (2005), por exemplo. Os resultados apontam para problemas estruturais (administrativos, recursos humanos, metodológicos, recursos didáticos) como empecilhos para a atenção à heterogeneidade. Em função disso, não se promove produção de texto, nem um ensino efetivo, processual e progressivo, que atenda aos diferentes perfis de sujeitos. Como fatores positivos, observamos que as atividades focam o texto como ponto de partida e as intervenções meramente metalingüística têm perdido espaço na sala de aula. Além disso, vêem-se, embora de maneira incipiente, atividades em que se escolarizaram contribuições científicas importantes no que tange ao ensino da produção textual. Em resumo, constata-se que o ensino de produção textual em pré- vestibulares exige, primeiro, uma mudança na forma de conceber seu público alvo e, depois, uma urgente absorção do que a Ciência tem produzido a respeito de se atingir as individualidades. Acreditamos que, dotando os sujeitos do domínio do discurso escrito argumentativo, abem-se mais chances para a sua ascensão e a sua inclusão no acervo cultural herdado e no sistema de atividades cada vez mais permeado e organizado por gêneros de textos escritos e orais (BAZERMAN, 2005; GNERRE, 1998; OLSON, 1997)This study looks into the teaching of text production in evening courses which aim to prepare students for the university entrance exams (known as vestibular), and which are offered by three private teaching institutions in Recife. Its main objective is to contrast the teaching of essay writing with the heterogeneity of the subjects who enroll for such courses. Specific objectives involve, first and foremost, comparing the quality of teaching in the three institutions and, secondly, to investigate the extent to which such teaching enables these subjects to produce competitive texts in which they also present themselves as the authors of their own production (PILAR, 2005, POSSENTI, 1999; BRONCKART, 1999). This is a field and documental study. We have collected two types of documents from the teaching institutions: The enrolment forms and the lesson notes. The data extracted from such documents is the basis of our analysis. From the enrolment forms we have collected possible traits from the subjects social-economical profile. Our aim here was to investigate how far the teaching of essay writing could cater for the heterogeneity of profiles in these classrooms. We also aimed to investigate, from the lesson notes, whether the teaching methods implied in the contents of such notes would actually provide the subjects with the right tools for text production. More specifically the production of a text which meets the standard required by the university entrance exams (vestibular) examining board, and which enables subjects to present themselves as the authors of their own production as stated by Pilar (2005), for instance. Results point to structural problems (administrative ones, human resources, methodological and didactic resources) which affect attention to heterogeneity. Consequently, no text productions is promoted, nor is teaching effective, process-oriented, progressive, and catering to the different subjects needs. On the positive side, we notice that the activities focus on the text as a starting point and merely metalinguistic interventions have had little room in the classroom. What is more, we could also see, albeit discretely, activities in which important scientific contributions relating to the teaching of text production are embedded. In sum, we can conclude that the teaching of text production in preparation courses for the university entrance exams requires, in the first place, a change in the way these courses address their target audience, and, secondly, an urgent insertion of what Science has produced in the area of meeting individual needs. We believe that, by providing subjects with the ability to produce discursive texts, there will be more chances of ascension and inclusion of these subjects in the cultural heritage, and in a system that is more and more surrounded and organized by genres of written and oral texts (BAZERMAN, 2005; GNERRE, 1998; OLSON, 1997)
13
Hall, Courtney D., Susan J. Herdman, Susan L. Whitney, and Lisa Heusel-Gillig. "Vestibular Rehabilitation for Peripheral Vestibular Hypofunction: Clinical Practice Guideline and Beyond!" Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/565.
Full textAbstract:
Description:It is estimated that 35.4% of adults in the United States have vestibular dysfunction requiring medical attention, and the condition results in a substantial increase in fall risk. The Neurology Section and APTA supported the development of a clinical practice guideline (CPG) for vestibular rehabilitation of peripheral vestibular hypofunction. A Cochrane Database systematic review concluded that there is moderate to strong evidence in support of vestibular rehabilitation in the management of patients with unilateral vestibular hypofunction for reducing symptoms and improving function. The purpose of the CPG is to review the peer-reviewed literature and make recommendations based on the quality of the research for the treatment of peripheral vestibular hypofunction. The speakers will present the findings of clinical practice guidelines (CPG) for vestibular rehabilitation, including clinical and research recommendations. The session will use a case-based approach to illustrate implementation of these guidelines in clinical practice. Learning Objectives:1 . Describe and discuss the action statements from the vestibular rehabilitation CPG. 2. Implement the action statements into clinical practice. 3. Identify the gaps in the evidence and future research directions in vestibular rehabilitation.
14
Youssif, Mostafa A. "Vestibular Evoked Myogenic Potential (VEMP) in children with Enlarged Vestibular Aqueduct (EVA)." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337288625.
Full text
15
Hall, Courtney D., Susan J. Herdman, Susan L. Whitney, Stephen P. Cass, Richard A. Clendaniel, and Terry D. Fife. "Vestibular Rehabilitation for Peripheral Vestibular Hypofunction: An Evidence-Based Clinical Practice Guideline." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/543.
Full textAbstract:
Background: Uncompensated vestibular hypofunction results in postural instability, visual blurring with head movement, and subjective complaints of dizziness and/or imbalance. We sought to answer the question, “Is vestibular exercise effective at enhancing recovery of function in people with peripheral (unilateral or bilateral) vestibular hypofunction?” Methods: A systematic review of the literature was performed in 5 databases published after 1985 and 5 additional sources for relevant publications were searched. Article types included meta-analyses, systematic reviews, randomized controlled trials, cohort studies, case control series, and case series for human subjects, published in English. One hundred thirty-five articles were identified as relevant to this clinical practice guideline. Results/Discussion: Based on strong evidence and a preponderance of benefit over harm, clinicians should offer vestibular rehabilitation to persons with unilateral and bilateral vestibular hypofunction with impairments and functional limitations related to the vestibular deficit. Based on strong evidence and a preponderance of harm over benefit, clinicians should not include voluntary saccadic or smooth-pursuit eye movements in isolation (ie, without head movement) as specific exercises for gaze stability. Based on moderate evidence, clinicians may offer specific exercise techniques to target identified impairments or functional limitations. Based on moderate evidence and in consideration of patient preference, clinicians may provide supervised vestibular rehabilitation. Based on expert opinion extrapolated from the evidence, clinicians may prescribe a minimum of 3 times per day for the performance of gaze stability exercises as 1 component of a home exercise program. Based on expert opinion extrapolated from the evidence (range of supervised visits: 2-38 weeks, mean = 10 weeks), clinicians may consider providing adequate supervised vestibular rehabilitation sessions for the patient to understand the goals of the program and how to manage and progress themselves independently. As a general guide, persons without significant comorbidities that affect mobility and with acute or subacute unilateral vestibular hypofunction may need once a week supervised sessions for 2 to 3 weeks; persons with chronic unilateral vestibular hypofunction may need once a week sessions for 4 to 6 weeks; and persons with bilateral vestibular hypofunction may need once a week sessions for 8 to 12 weeks. In addition to supervised sessions, patients are provided a daily home exercise program. Disclaimer: These recommendations are intended as a guide for physical therapists and clinicians to optimize rehabilitation outcomes for persons with peripheral vestibular hypofunction undergoing vestibular rehabilitation.
16
Barros, Camila de Giacomo Carneiro. "Efeitos da substituição vestibular eletrotátil na reabilitação de pacientes com arreflexia vestibular bilateral." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/5/5143/tde-24052011-141348/.
Full textAbstract:
O presente estudo avaliou a eficácia do equipamento de biofeedback eletrotátil lingual (BrainPort®) como substituto sensorial para o aparelho vestibular em pacientes com arreflexia vestibular bilateral (AVB) que não obtiveram boa resposta à terapia convencional de reabilitação vestibular (RV). Sete pacientes com AVB foram treinados a usar o equipamento. A estimulação na superfície da língua foi criada por um padrão dinâmico de pulsos elétricos e o paciente capaz de ajustar a intensidade de estimulação e centralizar o estímulo na placa de eletrodos. Os pacientes foram orientados a continuamente ajustar a orientação do posicionamento da cabeça e a manter o padrão de estímulos no centro da placa. Tarefas posturais que apresentavam dificuldade progressiva foram realizadas durante o uso do equipamento. A distribuição do índice de equilíbrio do teste de integração sensorial (TIS) pré e pós-tratamento mostrou valores médios de 38.3±8.7 e 59.9±11.3, respectivamente, indicando melhora significante estatisticamente (p=0,01). O aparelho de feedback eletrotátil lingual melhorou significantemente o controle postural no grupo de estudo, superando a melhora obtida com a RV convencional. O sistema de biofeedback eletrotátil foi capaz de fornecer informações adicionais sobre o posicionamento da cabeça em relação à orientação vertical gravitacional na ausência da aferência vestibular, melhorando o controle postural. Pacientes com AVB podem integrar a informação eletrotátil no controle da postura com o objetivo de melhorar a estabilidade após a RV convencional. Estes resultados foram obtidos e verificados, não apenas pelo questionário subjetivo, mas também pelo índice de equilíbrio do TIS. As limitações do estudo foram o tamanho reduzido da amostra e a curta duração do seguimento. Os presentes achados mostram que a substituição sensorial mediada pelo feedback eletrotátil lingual pode contribuir para a melhora do equilíbrio nesses pacientes se comparada à RVThe present study evaluated the effectiveness of electrotactile tongue biofeedback (BrainPort®) as a sensory substitute for the vestibular apparatus in patients with bilateral vestibular loss (BVL) who did not have a good response to conventional vestibular rehabilitation (VR). Seven patients with BVL were trained to use the device. Stimulation on the surface of the tongue was created by a dynamic pattern of electrical pulses and the patient was able to adjust the intensity of stimulation and spatially centralize the stimulus on the electrode array. Patients were directed to continuously adjust head orientation and to maintain the stimulus pattern at the center of the array. Postural tasks that present progressive difficulties were given during the use of the device. Pre- and post-treatment distribution of the sensory organization test (SOT) composite score showed an average value of 38.3±8.7 and 59.9±11.3, respectively, indicating a statistically significant improvement (p = 0.01). Electrotactile tongue biofeedback significantly improved the postural control of the study group, even if they had not improved with conventional VR. The electrotactile tongue biofeedback system was able to supply additional information about head position with respect to gravitational vertical orientation in the absence of vestibular input, improving postural control. Patients with BVL can integrate electrotactile information in their postural control in order to improve stability after conventional VR. These results were obtained and verified not only by the subjective questionnaire but also by the SOT composite score. The limitations of the study are the small sample size and short duration of the follow-up. The current findings show that the sensory substitution mediated by electrotactile tongue biofeedback may contribute to the improved balance experienced by these patients compared to VR
17
Zhang, Keqin 1962. "Exploring fast phases of the vestibulo-ocular reflex as indicators of vestibular lesion." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23761.
Full textAbstract:
This thesis investigates the dynamic characteristics of fast phase eye movements in the Vestibulo-Ocular Reflex (VOR) and their application in vestibular lesion clinics. Eye responses in the VOR consist of alternations between slow phases (eye moves opposite to head) to stablize the eye in space and fast phases to quickly redirect the eye in space. At the end of each fast phase segment, the eye position appears well correlated with head velocity. In contrast to slow phases, fast phases are of quite short duration. Therefore, they must be detected precisely in order to do any further analysis. This thesis reports an improved version of a previous autoregression (ARX) model classification algorithm, to allow automatic classification of fast phase segments or to detect only end points of fast phases.Results in this thesis demonstrate that the dynamics associated with the fast phase end points present specific patterns. These patterns can be represented as a linear or a cubic equation. In other words, a first-order or third-order polynomial can be fitted to the experimental data by the least square technique. The DC bias of the fitted data shows distinctive ranges for normal subjects and vestibular lesion patients. The asymmetric an non-linear shapes of the fitted curve can also denote a lesion. Other dynamic properties, such as the fast phase segment frequencies or the phase shift between the output eye position and input head velocity, have strong tendencies to differentiate normals from patients. In addition, the characteristics of fast phase beginning points suggest that the initiation of fast phases in independent of any obvious eye velocity or eye position threshold.
18
Ferreira, Ricardo Filipe da Silva. "Síndrome vestibular em canídeos." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2009. http://hdl.handle.net/10400.5/1623.
Full textAbstract:
Dissertação de Mestrado Integrado em Medicina VeterináriaA síndrome vestibular é uma apresentação neurológica relativamente comum em Medicina Veterinária. É definida como o conjunto de sinais clínicos associados a uma doença do sistema vestibular. A função do sistema vestibular é traduzir as forças de gravidade e movimento em sinais neurológicos utilizados pelo encéfalo para a determinação da posição da cabeça no espaço, e para a coordenação dos movimentos da cabeça com os reflexos motores responsáveis pela estabilidade postural e ocular. Desta forma, afecções do sistema vestibular resultam, frequentemente, em alterações posturais da cabeça e corpo, descoordenação motora e ataxia, e alterações nos movimentos oculares. O sistema vestibular é constituído por dois componentes funcionais: o componente periférico, localizado no ouvido interno e no qual se incluem os receptores sensoriais localizados no labirinto membranáceo e a porção vestibular do nervo craniano VIII; e o componente central, localizado no tronco cerebral e cerebelo, e no qual se incluem os núcleos e feixes vestibulares. Os cães com doença vestibular central apresentam, tipicamente, sinais clínicos adicionais que reflectem envolvimento do tronco cerebral. Estes podem incluir défices dos nervos cranianos, parésia, défices nas reacções posturais e estado mental alterado. É assim possível a diferenciação clínica entre a síndrome vestibular periférica e a síndrome vestibular central. Este é, aliás, o passo fundamental para a realização de um diagnóstico diferencial adequado, um plano diagnóstico e terapêutico correcto, assim como para elaborar considerações sobre o prognóstico. O protocolo terapêutico e o prognóstico são directamente dependentes da etiologia da disfunção vestibular, apresentando, por isso, grande variabilidade. As duas afecções mais comuns, que causam disfunção vestibular central, são neoplasias e infecção / inflamação; enquanto que em pacientes com sinais vestibulares periféricos, a otite média / interna e a doença vestibular idiopática são os diagnósticos mais frequentes. A componente prática da presente dissertação incide na descrição e análise de 8 canídeos apresentados à consulta no Hospital Escolar da Faculdade de Medicina Veterinária da Universidade Técnica de Lisboa, com síndrome vestibular. Foram observados 5 canídeos com síndrome vestibular periférica, um deles com afecção bilateral do sistema vestibular, e 3 canídeos com síndrome vestibular central. Apesar de algumas dificuldades terem limitado, nalguns casos, a obtenção de um diagnóstico etiológico definitivo, a realização de um diagnóstico anatómico correcto foi possível na maioria dos casos.
ABSTRACT - CANINE VESTIBULAR SYNDROME - Vestibular syndrome is a relatively common neurologic presentation in Veterinary Medicine. It is defined as a combination of clinical signs associated with disease of the vestibular system. The function of the vestibular system is to transduce the forces of gravity and movement into neurologic signals that the brain can use to determine the position of the head in space, and to coordinate head movements with the motor reflexes responsible for postural and ocular stability. Thus, lesions of the vestibular system commonly result in abnormal posture of the head and body, motor incoordination and ataxia, and abnormal eye movements. The vestibular system is composed of two functional components: the peripheral component, located in the inner ear, include the sensory receptors located in the membranous labyrinth and the vestibular portion of cranial nerve VIII; and the central component, located in the brainstem and cerebellum, include vestibular nuclei and pathways. Dogs with central vestibular disease typically have additional clinical signs reflective of brainstem involvement. These can include deficits of cranial nerves, paresis, postural reaction deficits and altered mental status. It is then possible to clinically differentiate peripheral vestibular syndrome from central vestibular syndrome. In fact, this is the fundamental step in the elaboration of a proper differential diagnosis, an accurate diagnostic and therapeutical plan, and in the elaboration of prognostic considerations. The treatment and prognosis are directly dependent of the vestibular dysfunction aetiology, thus presenting great variability. The two most common disease processes that cause central vestibular dysfunction are neoplasia and infection / inflammation; whilst the two most common diagnoses in patients with peripheral vestibular signs are otitis media / interna and idiopathic vestibular disease. The practical component of this thesis concerns the study of 8 dogs presented with vestibular syndrome, at the Faculty of Veterinary Medicine Teaching Hospital. Five dogs with peripheral vestibular syndrome, one of which with bilateral disease of the vestibular system, and 3 dogs with central vestibular syndrome were observed. Despite some limitations in the attainment of a definitive etiologic diagnosis in some cases, an accurate anatomic diagnosis was possible in most cases.
19
Levo, Hilla. "Vestibular schwannoma : postoperative recovery." Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/laa/kliin/vk/levo/.
Full text
20
Valsechi, Geisielen Santana. "Vestibular, estudo de caso." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/158456.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão, Programa de Pós-Graduação em Estudos da Tradução, Florianópolis, 2015.Made available in DSpace on 2016-01-15T14:56:00Z (GMT). No. of bitstreams: 1 336869.pdf: 2106922 bytes, checksum: 757374e74c6a72fcec8764c006ac3823 (MD5) Previous issue date: 2015
Nesta dissertação, apresentamos uma pesquisa investigativa sobre a necessidade de padronizar as metodologias de uso da prosódia na tradução para Libras, do texto da Língua Fonte (LF) para a Língua Alvo (LA), nos vestibulares brasileiros. O desenvolvimento deste trabalho foi baseado na leitura de teorias, análise de prosódia e análise das provas, em vídeo, de vestibulares em quatro universidades federais, Universidade Federal de Santa Catarina (UFSC), Universidade Federal de Goiás (UFG), Universidade Federal do Tocantins (UFT), Universidade de Brasília (UnB), e de uma universidade estadual, Universidade Estadual de Londrina (UEL), com o intuito de detectar o nível de clareza e a influência da prosódia utilizada nos diferentes recursos de tradução. As análises foram focadas nas universidades que oferecem tradução/interpretação para Libras, como a UFSC, no curso de Letras/Libras desde 2006. A UFG também oferecia a prova com tradução desde 2012, e a UEL ofereceu a prova diferenciada no vestibular, com tradução para Libras em vídeo, pela primeira vez em 2012. Atualmente as universidades federais (UFT) e (UnB) também apresentam as traduções para Libras nas provas de vestibulares do curso de Letras/Libras, cujos vídeos serão aqui analisados. A pesquisa também aponta os caminhos de lutas da comunidade surda com relação aos direitos de adaptação das provas nos vestibulares. O direito do surdo é o de ser atendido em sua língua natural, a Língua Brasileira de Sinais ? Libras (L1), e depois na Língua Portuguesa (L2), sua segunda língua. Além disso, os resultados da pesquisa destacam propriedades da Libras, dentro da proposta de categorizar os elementos prosódicos: datilologia, olhos, boca e classificador/descrição imagética, contribuindo para a qualidade visual da tradução nas provas vestibulares, pois se faz necessário buscar os aspectos prosódicos para uma boa visualização dos tradutores. Concluindo essa proposta acerca dos aspectos prosódicos, o desafio é de apresentar as comparações das categorias e a análise da prosódia contida nas provas em vídeo, a fim de problematizar e propor o cumprimento do direito por meio da efetivação da Lei nº 10.436, numa clara busca pelo respeito à língua e à cultura surda, em mais este campo de atuação e de direito destes indivíduos.
Abstract : In this thesis we present an investigative research about the need to standardize the methodologies of prosody use in translation for Libras, of the text of the Source Language to the Target Language, in Brazilian vestibulars. The development of this work was based on readings of theories, prosody analysis videos used in college entrance exams of four federal universities, Federal University of Santa Catarina (UFSC), Federal University of Goiás (UFG), Federal University of Tocantins (UFT) and University of Brasília (UnB), and one state university, State University of Londrina (UEL), in order to identify the level clarity and the role of prosody in different translation resources. The analyses focused on the universities that offer the college entrance exam translated/interpreted to Brazilian Sign Language like UFSC, in the admission process to Sign Language Studies Course since 2006, and the case of UFG, that has provided the translated exam since 2012. Also, UEL that provided a differenciated test transladet to Brazilian Sign Language by means of videos for the first time in 2012. Currently the federal universities (UFT) and (UnB) also have translations for Libras in tests of vestibular course Letras/Libras, whose videos will be analyzed here.This research also points to ways for fighting for accessibility rights by the deaf community regarding admission to universities. The deaf have the right to be served in their natural language, the Brazilian Sign Language ? Libras (L1), and then in Portuguese (L2), their second language. In addition, the survey results highlight properties of Libras within the proposed categorizing the prosodic elements: dactylology, eyes, mouth and classifier/description imagery, contributing to the visual quality of the translation in the vestibular tests, because it is necessary to seek prosodic aspects for a good visualization of translators. Completing this proposal about the prosodic aspects, the challenge is to present the comparisons of categories and analysis of the categories of prosody contained in the video evidence, to discuss and propose the compliance of the right through the adoption of Law no. 10,436, a clear search by respect to the language and deaf culture, in this action field and the right of these individuals.
21
Murnane, Owen D. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etsu-works/1933.
Full text
22
Murnane, Owen D. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2004. https://dc.etsu.edu/etsu-works/1948.
Full text
23
Murnane, Owen D. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2005. https://dc.etsu.edu/etsu-works/1947.
Full text
24
Murnane, Owen D. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etsu-works/1932.
Full text
25
Hall, Courtney D., and Sue Whitney. "Vestibular Hypofunction Treatment Update." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/etsu-works/2711.
Full textAbstract:
Host Maureen Clancy PT, DPT, OCS is joined by Dr. Courtney Hall PT, PhD and Dr. Sue Whitney PT, PhD, NCS, ATC, FAPTA in a dicsussion on vestibular hypofunction. This podcast reviews the medical conditions that would lead to a diagnosis of hypofunction, clincal testing, treatment, exercise prescription, and the key updates from the recent CPG on vestibular hypofunction. For additional information please go to: http://www.neuropt.org/professional-resources/anpt-clinical-practice-guidelines/vestibular-hypofunction-cpg
26
Akin, Faith W. "War-related Vestibular Dysfunction." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/2425.
Full text
27
Akin, Faith W. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etsu-works/2452.
Full text
28
Akin, Faith W. "Interpretation of Vestibular Assessment." Digital Commons @ East Tennessee State University, 1999. https://dc.etsu.edu/etsu-works/2457.
Full text
29
Akin, Faith W., and Owen D. Murnane. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2008. https://dc.etsu.edu/etsu-works/1939.
Full text
30
Murnane, Owen D., and Faith W. Akin. "Vestibular-Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2009. https://dc.etsu.edu/etsu-works/1795.
Full textAbstract:
Cervical vestibular-evoked myogenic potentials (cVEMPs) are recorded from the sternocleidomastoid muscle using air conduction or bone conduction acoustic stimuli, skull taps, or transmastoid current. The diagnostic usefulness of the cVEMP has been examined for various peripheral and central vestibulopathies. Recent reports indicate that it is possible to record short-latency ocular vestibular-evoked myogenic potentials (oVEMPs) from surface electrodes below the eyes in response to air conduction and bone conduction stimuli. Both methods provide diagnostic information about otolith function. This article provides an overview of each method and highlights the similarities and differences. Several cases are presented to illustrate the relation between the results for cVEMPs and oVEMPs in patients with well-defined audiovestibular disorders.
31
Akin, Faith W., and Owen D. Murnane. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2001. https://dc.etsu.edu/etsu-works/1916.
Full text
32
Akin, Faith W., and Owen D. Murnane. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/1944.
Full text
33
Akin, Faith W. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/2450.
Full text
34
Akin, Faith W., and Owen D. Murnane. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2000. https://dc.etsu.edu/etsu-works/1920.
Full text
35
Akin, Faith W., and Owen D. Murnane. "Vestibular Evoked Myogenic Potentials." Digital Commons @ East Tennessee State University, 2006. https://dc.etsu.edu/etsu-works/1945.
Full text
36
Tangorra, James Louis 1967. "System identification of the vestibular ocular reflex via visual and vestibular co-stimulation." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29623.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.Includes bibliographical references (p. 317-321).
The study of eye motions involved in the vestibular ocular reflex (VOR) is a key tool for understanding the performance of the vestibular system and for the diagnosis of dysfunction. Limitations in experimental equipment and in the analytic methods applied have resulted in VOR testing being conducted under artificial laboratory conditions that do not resemble the conditions under which the VOR naturally functions. The results from these tests are often unreliable, and may, in fact, misrepresent the function and performance of the VOR and the vestibular system. The purpose of this thesis was to develop the experimental equipment, protocol, and analysis algorithms required to conduct a stochastic system identification of the horizontal, rotational VOR, while it was being used to stabilize gaze during natural, head-free tracking. By providing statistically uncorrelated stimuli to the visual and vestibular systems, estimates of the VOR's impulse response function could be made as subjects tracked a visual target that moved with an unpredictable trajectory. A novel stochastic technique was developed to generate the visual and vestibular input sequences such that they had appropriate amplitude distributions, and auto- and cross-correlation functions. The results showed that the technique was able to identify the dynamics of the VOR over the frequency range that it naturally functions to stabilize gaze, that is from below 0.5 Hz through 4.0 Hz. Nonlinearities in the head-neck control system limited the analysis at low frequencies, and difficulties in calculating high frequency eye velocities limited the accuracy of the analysis at high frequencies.
(cont.) Unlike the rotational VOR tests that are commonly used today, this technique was able to distinguish between the visually and vestibularly driven eye responses, and was able to show that during head-free gaze tracking, the vestibular system is able to compensate for head disturbances with a near unity gain.
by James Louis Tangorra.
Ph.D.
37
Riska, Kristal M., Faith W. Akin, and Owen D. Murnane. "Patterns of Vestibular Findings Among Veterans Presenting with Dizziness to the Vestibular Clinic." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etsu-works/1875.
Full textAbstract:
The purpose of this session is to present data on the patterns of clinical findings in Veterans referred for vestibular assessment. Specifically, we will examine the proportion of abnormalities of the horizontal semi-circular canal and the otolith organ pathways.
38
Gonçalves, Carolina das Neves Campos Barata. "Síndrome vestibular em animais de companhia : estudo retrospetivo de 29 casos clínicos." Master's thesis, Universidade de Lisboa. Faculdade de Medicina Veterinária, 2016. http://hdl.handle.net/10400.5/11057.
Full textAbstract:
Dissertação de Mestrado Integrado em Medicina VeterináriaO sistema vestibular é o sistema sensorial responsável por manter o equilíbrio do animal em relação ao campo gravitacional da Terra, e ainda por ajustar o posicionamento dos olhos, pescoço, tronco e membros durante os movimentos da cabeça. Este sistema está dividido em duas componentes funcionais: a componente periférica, composta pelo nervo craniano vestibulococlear (VIII) e os seus recetores sensoriais localizados no ouvido interno, e a componente central, composta pelos núcleos e vias vestibulares localizados no tronco cerebral e cerebelo. Quando ocorrem alterações numa destas componentes, o animal desenvolve um conjunto de sinais clínicos que caracterizam a chamada síndrome vestibular. Os sinais que compõem a síndrome vestibular incluem desequilíbrios, perda de coordenação, quedas e inclinação da cabeça normalmente para o lado afetado, nistagmos patológico e, estrabismo posicional também do lado afetado. Através do exame neurológico, é possível prever a localização das lesões e diferenciar em síndrome vestibular periférica, central, e ainda dentro desta em paradoxal. Esta diferenciação é importante, uma vez que vai determinar qual a lista de diagnósticos diferenciais, o plano de diagnóstico a seguir e também porque o prognóstico está intimamente relacionado com o tipo de síndrome apresentada, assim como a terapêutica. Existem diversas doenças que podem provocar o aparecimento de sinais vestibulares, sendo que as mais comuns na síndrome vestibular periférica são a otite média/interna e a síndrome vestibular idiopática, e na síndrome vestibular central são as doenças inflamatórias do sistema nervoso central e as neoplasias. A componente prática deste trabalho consiste num estudo retrospetivo de 29 casos clínicos, que se apresentaram na Referência Veterinária com sinais de síndrome vestibular e que foram avaliados através de ressonância magnética. Deste estudo concluiu-se que a síndrome vestibular é uma disfunção neurológica que afeta animais de todas as idades e, confirmou-se que as etiologias mais comuns descritas na bibliografia correspondem ao que ocorre na prática clínica. Este estudo foi também importante para perceber que a realização de ressonância magnética é relevante tanto nos animais com síndrome vestibular periférica como central, uma vez que existem casos em que os sinais clínicos que ajudam na sua diferenciação são subtis e podem estar mascarados pela terapêutica administrada. Percebeu-se ainda que o exame neurológico é um método bastante fiável na previsão da localização das lesões e na diferenciação entre síndrome vestibular periférico, central e periférico.
ABSTRACT - Vestibular Syndrome in Small Animals: retrospective study about 29 clinical cases - The vestibular system is the sensory system responsible for maintaining the animal’s balance relative to the gravitational field of the earth, and to adjust de position of the eyes, neck, trunk and limbs during the movement of the head. This system is divided in two functional components: the peripheral component, composed by the vestibulocochlear nerve (VIII) and its sensory receptors in the inner ear, and the central component, composed by the vestibular nuclei and pathways in the brainsteam and cerebellum. When one of these components is affected, the animal develops signs characterizing the vestibular syndrome. These clinical signs include loss of coordination and balance, falls, head tilt and positional strabismus, all to the side of the lesion, and pathologic nystagmus. The neurological examination allows to predict the location of the lesion and to clinically differentiate peripheral from central and paradoxical vestibular syndrome. This differentiation is important in determining the differential diagnoses, the diagnostic plan and also the prognosis and therapeutic plan. Several diseases could cause the onset of vestibular signs. The most common causes of peripheral vestibular syndrome are otitis media/interna and idiopathic vestibular syndrome, while the most common causes of central vestibular syndrome are inflammatory/infectious diseases of the central nervous system and neoplasia. The practical component consists in a retrospective study of 29 clinical cases who presented at the clinic Referência Veterinária with signs of vestibular syndrome and were evaluated through magnetic resonance imaging. At the end of the study it was concluded that vestibular syndrome is a neurologic dysfunction who affects animals at any age, and it was confirmed that the most common etiologies described correspond to the observed at clinical practice. This study was important to understand that the use of magnetic resonance imaging is important at the evaluation of animals with central vestibular syndrome, and even with peripheral vestibular dysfunctions. There are some cases where the clinical signs used to differentiate the types of vestibular syndrome are subtle and can be attenuated by the administered drugs. Finally, it was also concluded that the neurological examination is a very reliable method to predict the location of the lesions and to differentiate between peripheral, central and paradoxical vestibular syndrome.
39
Farrow, Karl. "The neural basis of recovery from unilateral vestibular damage, role of the vestibular commissure." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63192.pdf.
Full text
40
Dakin, Christopher James. "The development of stochastic vestibular stimulation and its application to dynamic vestibular evoked responses." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43284.
Full textAbstract:
The vestibular system provides sensory information regarding linear and angular motion of the head for tasks such as spatial navigation and postural stabilization. In these dynamic environments examination of vestibular signals is experimentally difficult given current techniques. Recently, continuous stochastic stimuli have shown promise in addressing some limitations in current vestibular probes and might provide a useful tool for investigating the dynamic behaviour of the vestibular system. The purpose of this thesis is a) to develop further the stochastic stimulus format by examining the customizability of the stimulus bandwidth and the stimulus’ effectiveness in extracting dynamic responses, and b) to use these advancements to explore dynamic vestibular function during locomotion and head rotation.
Exploration of the customizability of stimulus bandwidth revealed that a single broad bandwidth stimulus provides similar information to the sum of a series of sinusoidal stimuli or narrow bandwidth stimuli, but in much less time, and that stimulus bandwidth can be modified, by removing frequencies below 2 Hz, to attenuate the postural perturbation created by the stimulus. In a dynamic context the stochastic stimulus was also shown to be very effective in extracting the time varying modulation of vestibular-evoked responses during motion by identifying phase-dependent vestibular responses in the gastrocnemius during locomotion. The stochastic stimulus was then used to examine vestibular modulation and suppression during locomotion and vestibular spatial transformation during head turn. During locomotion, phase-dependent modulation of vestibular responses was observed in muscles of the leg and hip. In some muscles around the ankles these responses are attenuated with increasing cadence and walking speed. Lastly the transmission and spatial transformation of these vestibular-evoked responses are not hindered by motion and the spatial transformation occurs in nearly real time during head rotation.
In general, the stochastic stimulus can be customized to reduce postural sway and is effective in extracting the dynamic modulation of vestibular influence on muscle activation.
The identification of widespread phase-dependent vestibular coupling in the lower limbs and continuous spatial transformation of vestibular signals demonstrates that the stochastic waveform is an effective tool for the investigation of human vestibular physiology in dynamic contexts.
41
Rössert, Christian Andreas. "Reverse engineering the vestibular system." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-131165.
Full text
42
Law, Tammy Che-Yan. "Recalibration of the vestibular system." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36344.
Full textAbstract:
The vestibular system conveys information regarding head motion to the central nervous system (CNS). Independently, this vestibular signal of head motion does not provide an absolute reference of head motion as the frequency coding of the afferent nerves is influenced by adaptation properties and nonlinearities. The optic flow signal of head rotation from the visual system however, is spatially encoded and can function as an absolute reference. The aim of this study was to determine if a visual signal of head rotation can recalibrate an altered vestibular signal of head motion during standing balance and to investigate the underlying mechanisms of this recalibration at the muscular level.
Eight healthy subjects were exposed to an electrical vestibular stimulus correlated to head movement (±0.125 mA/°/s) while standing on foam with eyes closed. This velocity-coupled vestibular stimulation (VcVS) was applied in a bipolar, bilateral orientation and depending on its polarity, resulted in the vestibular nerves coding for slower or faster head movements. Initially, this alteration of natural vestibular information destabilized subjects. During the conditioning phase, subjects opened their eyes and used visual information in combination with the new vestibular information to update their representation of self-orientation. Following this, subjects showed a significant decrease (~35%) in body sway while still receiving VcVS.
The mechanisms underlying vestibular recalibration were examined by observing how visuo-vestibular recalibration affected the vestibular-evoked muscular responses. Muscle activity was recorded in five subjects using surface electromyography (EMG) bilaterally on the medial gastrocnemius and tensor fascia latae muscles. Stochastic vestibular stimulation (SVS) in combination with VcVS was delivered to evoke biphasic muscular responses. Prior to the conditioning period, the peak amplitude of the response was significantly attenuated and then returned to control levels following conditioning.
Overall, these observations indicate that the vestibular system can be recalibrated by a visual signal of head rotation. This process is associated with an initial decrease in vestibular-evoked muscular responses which return to control levels once recalibration occurs. These results suggest that the CNS can modulate vestibular processes by down regulation or selective gating of vestibular signals in order to achieve vestibular recalibration.
43
Irving, Michael Richard. "Molecular genetics of vestibular schwannoma." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338957.
Full text
44
Smith, Laura. "Vestibular contributions to human memory." Thesis, University of Kent, 2017. https://kar.kent.ac.uk/63530/.
Full textAbstract:
The vestibular system is an ancient structure which supports the detection and control of self-motion. The pervasiveness of this sensory system is evidenced by the diversity of its anatomical projections and the profound impact it has on a range of higher level functions, particularly spatial memory. The aim of this thesis was to better characterise the association between the vestibular system and human memory; while many studies have explored this association from a biological perspective few have done so from a psychological one. In Chapter 1, evidence was drawn from 101 neuro-otology patients to show that vestibular dysfunction can exert a direct negative effect on memory and allied cognitive processes, independently of age and comorbid psychiatric and fatigue symptoms. In Chapters 3 and 4, the separability of these cognitive, psychiatric and fatigue symptoms was further demonstrated in eight traumatic brain injury patients who, following a programme of daily vestibular stimulation, showed cognitive improvement and electrophysiological modulation in the absence of psychiatric or fatigue-related changes. Finally in Chapter 5, a set of normative experiments indicated that, beyond any generic arousal effect (unspecific to any particular cognitive process), visual memory can utilise temporally coincident vestibular activation to help individuate one memory from another. Together these findings help clarify the range of and manner in which vestibular signals interact with visual short-term memory and allied cognitive processes. The findings also have clinical implications for the diagnosis and management of vestibular, neuropsychiatric and amnesic conditions.
45
Peixoto, Ana Filipa de Sousa Maia Sequeira. "Síndrome vestibular periférica em cães." Master's thesis, Universidade de Évora, 2022. http://hdl.handle.net/10174/31205.
Full textAbstract:
O presente relatório de estágio foi redigido no âmbito do estágio curricular do Mestrado Integrado em Medicina Veterinária e está dividido em quatro secções. O relatório de casuística aborda as atividades desenvolvidas na área de clínica e cirurgia de animais de companhia durante cinco meses, no Hospital Veterinário da Trofa. A monografia consiste numa revisão bibliográfica sobre a síndrome vestibular periférica em cães, e é seguida pela exposição e discussão de um caso clínico do mesmo tema.
Nos cães, a síndrome vestibular periférica deve-se principalmente a otite média-interna, síndrome vestibular periférica idiopática, neoplasia aural, hipotiroidismo, exposição a tóxicos ou doença vestibular congénita. Os animais podem surgir com inclinação cefálica, nistagmo patológico, estrabismo vestibular, ataxia vestibular e paralisia do nervo facial. Os exames complementares de diagnóstico incluem o exame otoscópico, miringotomia, radiografia e tomografia computorizada. O tratamento deve dirigir-se à etiologia identificada; Abstract: Peripheral Vestibular Syndrome in Dogs
The current report was carried out within the scope of the Master’s Degree in Veterinary Medicine’s curricular internship and is divided in four sections. The casuistic report goes over the activities followed in small animal practice and surgery throughout five months in the Trofa Veterinary Hospital. The monograph consists of a bibliographic review about peripheral vestibular syndrome in dogs, and is followed by a case report concerning the same subject and its discussion.
In dogs, peripheral vestibular syndrome is caused mainly by otitis media-interna, idiopathic peripheral vestibular syndrome, aural neoplasia, hypothyroidism, toxic exposure or congenital vestibular disease. Animals may present with head tilt, pathological nystagmus, vestibular strabismus, vestibular ataxia and facial nerve paralysis. Complementary diagnostic exams include otoscopic examination, myringotomy, radiography and computerized tomography. Treatment must focus on the identified etiology.
46
Manczak, Tiago. "Estimulador galvânico vestibular para fMRI." Universidade Tecnológica Federal do Paraná, 2012. http://repositorio.utfpr.edu.br/jspui/handle/1/406.
Full textAbstract:
Este trabalho apresenta o desenvolvimento de um estimulador galvânico vestibular para ser usado em experimentos de imageamento por ressonância magnética funcional (fMRI). Em experiências de fMRI é necessário a produção de estímulos somatossensoriais no paciente. Os estímulos devem ser sincronizados com a sequência de pulsos da fMRI. O estimulador foi dividido em circuitos analógicos (colocados dentro da sala do magneto) e circuitos digitais (sala de comando do sistema de MRI). A comunicação entre os circuitos é feita através de fibra óptica. Experimentos de fMRI realizados com voluntários demonstraram que o estimulador proposto é capaz de manter a sincronização com sistema de fMRI e pode ser usado para localizar as áreas do cérebro que são ativados pelo sistema vestibular.This work presents the development of a galvanic vestibular stimulator to be used in functional magnetic resonance imaging experiments (fMRI). In fMRI experiments it is required the production of somatosensory stimuli in the patient must be sincronized with the fMRI pulse sequence. The stimulator circuits were divided in analog circuits (placed within the magnet room) and digital circuits (placed in the MRI command room). The communication between the circuits is made through optical fiber. fMRI experiments performed with volunteers demonstrated that the proposed stimulator is able to keep the sincronization with the MRI system and can be used to locate the brain areas that are activated by the vestibular system.
47
Thum, Carmo. "Pré-vestibular público e gratuito." Florianópolis, SC, 2000. http://repositorio.ufsc.br/xmlui/handle/123456789/78448.
Full textAbstract:
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Educação.Made available in DSpace on 2012-10-17T14:29:39Z (GMT). No. of bitstreams: 0Bitstream added on 2014-09-25T16:46:48Z : No. of bitstreams: 1 172869.pdf: 11184699 bytes, checksum: f10be86c2a25cd9c80aafd548cb560f3 (MD5)
Descrição
48
Riska, Kristal M., and Owen D. Murnane. "Contemporary Issues in Vestibular Assessment." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/1927.
Full textAbstract:
This session is developed by, and presenters invited by, Hearing, Balance, Tinnitus – Assessment and Intervention: Adult. This presentation will provide an overview of contemporary measures of vestibular function with a focus on advantages, limitations, and clinical usefulness. The implementation and outcome of a triage clinic for patients suspicious of benign paroxysmal positional vertigo will also be described.
49
Murnane, Owen D. "Contemporary Issues in Vestibular Assessment." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu-works/1925.
Full text
50
Akin, Faith W., and Owen D. Murnane. "Advanced Techniques in Vestibular Assessment." Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/1943.
Full text