Bibliografías temáticas / Motor markers

Literatura académica sobre el tema "Motor markers"

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Publicado: 6 de julio de 2024

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Artículos de revistas sobre el tema "Motor markers":

Mano, Tomoo, Kaoru Kinugawa, Shigekazu Fujimura y Kazuma Sugie. "The Lateralization of Resting Motor Threshold to Predict Medication-Mediated Improvement in Parkinson’s Disease". Brain Sciences 12, n.º 7 (28 de junio de 2022): 842. http://dx.doi.org/10.3390/brainsci12070842.

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Cortical stimulation patterns in patients with Parkinson’s disease (PD) are asymmetric and get altered over time. This study examined cortical neurophysiological markers for PD and identified neurophysiological markers for lateralization in PD. We used transcranial magnetic stimulation (TMS) to study corticospinal and intracortical excitability in 21 patients with idiopathic PD. We used the Movement Disorder Society Unified Parkinson’s Disease Rating Scale for examination during on and off periods and evaluated inhibitory and facilitatory process markers using TMS, including resting motor thresholds (RMT), active motor thresholds, and motor evoked potential amplitude. The RMT in the more affected cortex was significantly shorter than in the less affected cortex, and was strongly correlated with improved motor function following medication. Patients in the tremor group exhibited significantly lower RMT compared to those in the akinetic-rigid group. Cortical electrophysiological laterality observed in patients with PD may be a useful marker for guiding treatment and identifying underlying compensatory mechanisms.

Yordanova, Juliana, Michael Falkenstein y Vasil Kolev. "Motor Oscillations as Markers of Error Processing". International Journal of Psychophysiology 168 (octubre de 2021): S98. http://dx.doi.org/10.1016/j.ijpsycho.2021.07.297.

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Baranov, Georgii D., Erivelton G. Nepomuceno, Michail A. Vaganov, Valerii Y. Ostrovskii y Denis N. Butusov. "New Spectral Markers for Broken Bars Diagnostics in Induction Motors". Machines 8, n.º 1 (28 de enero de 2020): 6. http://dx.doi.org/10.3390/machines8010006.

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The paper discusses the spectral markers of fault rotor bars in induction motor current signature analysis (MCSA). The results of the simulation of the deterioration process for a single rotor bar, as well as the results of research for various mutual bracing of two broken bars, are reported. We proposed a simple empiric technique allowing one to obtain frequencies for spectrum markers of damaged rotor bars based on simulation analysis. The set of frequencies obtained in the experimental part of the study was compared with simulation results and the results of real-life measurements. The theoretical results were verified through the experiment with the real induction motor under load. Analysis of experimental results proved that the given algorithm for spectrum analysis is suitable for early detection of fault rotor bars in induction motors.

Triwahyudin, Agus, Hari Kurnia Safitri y Mila Fauziyah. "Pembacaan Jarak dan Kecepatan dengan ArUco Marker pada Sistem Koper Follow Me Beroda". Majalah Ilmiah Teknologi Elektro 21, n.º 1 (9 de julio de 2022): 97. http://dx.doi.org/10.24843/mite.2022.v21i01.p14.

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Koper Follow Me Beroda merupakan robot otomatis yang dapat mengikuti perjalanan manusia untuk membawa barang dalam memenuhi keperluanya. Koper ini memiliki 2 mode; mode manual dan otomatis. Mode manual koper akan digunakan layaknya koper pada pada umumnya. Sedangkan mode otomatis, koper akan selalu mengikuti pemiliknya yang sudah memiliki tanda khusus (markers). Komponen utama sistem adalah kamera raspberry pi, raspberry pi 4, push button, buzzer, driver motor dan motor dc. Dengan melakukan image processing pada tanda khusus (markers) sehingga menghasilkan variabel jarak. Hasil pengolahan pembacaan variabel jarak akan diproses mejadi variabel kecepatan, sehingga range data error akan didapatkan. Penggunaan marker tipe ArUco Marker, pembatasan jarak pembacaan tanda khusus dengan jarak maksimal sejauh 2 meter yang sebisa mungkin stabil pada jarak 1 meter. Untuk mengantisipasi kegagalan pembacaan digunakan buzzer sebagai tanda bahwa Koper Follow Me telah jauh dari penggunanya. Pada hasil pengujian dengan menggunakan marker tipe ArUco Markers dihasilkan jarak minimal 74 mm, maksimal 2170 mm. Dengan tingkat error pembacaan paling kecil pada jarak 400 mm dan 1100 mm sedangkan untuk error pembacaan paling besar pada jarak 2000 mm dan untuk rata-rata error hasil pembacaan jarak sebesar 0,55 %.

Rogić, Maja y Ana Jerončić. "Neurophysiologic Markers of Motor Speech Related Cortical Areas". Procedia - Social and Behavioral Sciences 193 (junio de 2015): 228–33. http://dx.doi.org/10.1016/j.sbspro.2015.03.264.

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Duque, Julie, Ian Greenhouse, Ludovica Labruna y Richard B. Ivry. "Physiological Markers of Motor Inhibition during Human Behavior". Trends in Neurosciences 40, n.º 4 (abril de 2017): 219–36. http://dx.doi.org/10.1016/j.tins.2017.02.006.

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Kaufmann, Petra y Hiroshi Mitsumoto. "Amyotrophic lateral sclerosis: Objective upper motor neuron markers". Current Neurology and Neuroscience Reports 2, n.º 1 (febrero de 2002): 55–60. http://dx.doi.org/10.1007/s11910-002-0054-x.

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Scheinberg, Morton Aaron, Ricardo Prado Golmia, Adriana Maluf Elias Sallum, Maria Guadalupe Barbosa Pippa, Aline Pinheiros dos Santos Cortada y Telma Gomes da Silva. "Bone health in cerebral palsy and introduction of a novel therapy". Einstein (São Paulo) 13, n.º 4 (diciembre de 2015): 555–59. http://dx.doi.org/10.1590/s1679-45082015ao3321.

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ABSTRACT Objective To assess the bone health status of children with cerebral palsy and the therapeutic effect of denosumab in a subgroup of children with cerebral palsy and decreased bone mass. Methods Children with cerebral palsy were evaluated according to their motor disability score (classification system gross motor functions III to V), bone density and bone turnover markers. Dual X-ray energy absorption was used to measure the lumbar spine, and total body, except the head. Thereafter a group of children with cerebral palsy and osteoporosis was treated with denosumab, a fully human monoclonal antibody. Bone turnover markers were measured before and three months after treatment. Results Reduction in bone mineral density was observed, particularly in children with greater impairment evaluated by the motor score. Decreased bone turnover markers were found in a selected group of children three months after exposure to denosumab. Conclusion Bone loss was present in children with significant impairment of motor function, as well as decreased serum levels of bone resorption markers with new forms.

Einspieler, Bos, Krieber-Tomantschger, Alvarado, Barbosa, Bertoncelli, Burger et al. "Cerebral Palsy: Early Markers of Clinical Phenotype and Functional Outcome". Journal of Clinical Medicine 8, n.º 10 (4 de octubre de 2019): 1616. http://dx.doi.org/10.3390/jcm8101616.

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The Prechtl General Movement Assessment (GMA) has become a cornerstone assessment in early identification of cerebral palsy (CP), particularly during the fidgety movement period at 3–5 months of age. Additionally, assessment of motor repertoire, such as antigravity movements and postural patterns, which form the Motor Optimality Score (MOS), may provide insight into an infant’s later motor function. This study aimed to identify early specific markers for ambulation, gross motor function (using the Gross Motor Function Classification System, GMFCS), topography (unilateral, bilateral), and type (spastic, dyskinetic, ataxic, and hypotonic) of CP in a large worldwide cohort of 468 infants. We found that 95% of children with CP did not have fidgety movements, with 100% having non-optimal MOS. GMFCS level was strongly correlated to MOS. An MOS > 14 was most likely associated with GMFCS outcomes I or II, whereas GMFCS outcomes IV or V were hardly ever associated with an MOS > 8. A number of different movement patterns were associated with more severe functional impairment (GMFCS III–V), including atypical arching and persistent cramped-synchronized movements. Asymmetrical segmental movements were strongly associated with unilateral CP. Circular arm movements were associated with dyskinetic CP. This study demonstrated that use of the MOS contributes to understanding later CP prognosis, including early markers for type and severity.

Infarinato, Francesco, Fabien Pifferi, Anisur Rahman, Claudio Del Percio, Yves Lamberty, Fabienne Aujard y Claudio Babiloni. "P1-040: EEG markers of motor activity in lemurs". Alzheimer's & Dementia 9 (julio de 2013): P166—P167. http://dx.doi.org/10.1016/j.jalz.2013.05.260.

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Tesis sobre el tema "Motor markers":

Wright, David James. "Movement-related cortical potential markers of motor skill learning". Thesis, Manchester Metropolitan University, 2012. http://e-space.mmu.ac.uk/347080/.

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In this thesis the cortical processes involved in motor skill learning were examined. Electroencephalography (EEG) was used to record the movement-related cortical potential (MRCP): an event-related potential reflecting the cortical activity involved in motor planning and preparation, prior to performance of a guitar playing task. A series of five experiments was conducted to investigate how the MRCP may vary depending on a performer’s skill level and how it may change with skill learning. In Study 1 a scale-playing task on the guitar, from which it was possible to accurately record the MRCP, was identified. In Study 2, the MRCP was recorded during scale-playing on the guitar from a group of experienced guitarists and a group of non-musicians who had no prior musical training and no experience of playing any musical instrument. Differences in the amplitude and onset times of the MRCP components were compared across groups, with results indicating that the experienced guitarists allocated less cortical activity to planning the performance of the scale than the non-musicians. The purposes of Studies 3, 4, and 5 were to establish the extent to which these between-group differences were the result of training by the experienced guitarists. In Study 3 the effect of short-term practice on movement-related cortical activity was investigated and, contrary to the hypothesis, found an increase in cortical activity involved in movement preparation following practice on the guitar. In Studies 4a and 4b the effect of long-term motor practice on the MRCP was explored. Non-musicians took part in a five and ten week training programme, learning to play the guitar. Study 4a reported a decrease in cortical activity in certain parts of the motor cortex following five weeks of learning to play a scale on the guitar. When the training programme was extended to ten weeks in Study 4b however, an increase in cortical activity was found in certain areas of the motor cortex. Study 4c investigated the effect of a period of de-training on the MRCP in five participants. Results from these participants indicated a decrease in MRCP amplitude following training. This reduced amplitude was also found following a five-week period of de-training. Finally, in Study 5, within-session changes in cortical activity were investigated over an extended ten-week learning period. The combined results of Studies 3 and 5 indicate that there may be an increase in both pre- and primary motor cortex activity during the initial phase of motor skill learning, followed by a decrease in motor cortex activity once the performer becomes competent in the task. From the results of these studies, it was concluded that the process of motor skill learning is likely to be more complex than is currently stated in the literature. Rather than a simple linear decrease in the amount of cortical activity involved in motor planning as a result of learning, it is more likely that fluctuations in cortical activity occur at different stages in the learning period, which may, over time, lead to a reduced activity being required during motor preparation.

Agyapong-Badu, S. "Non-invasive bio-markers of motor performance with ageing". Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/372918/.

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Objective tests of motor function suitable for older people in epidemiological studies and community settings are lacking. The current study aimed to establish non-invasive biomarkers using conventional and novel tests that do not rely entirely on volition, and identify suitable analysis techniques for complex data. It was hypothesised that novel technologies would improve the discriminant validity of motor function testing. In 138 self-reported healthy males and females (65 young, mean age±SD = 25.7±4.8 years; 73 older, 74.9±5.9 years), nine tests (25 parameters) included: hand grip and quadriceps strength; respiratory muscle strength (peak flow); thigh composition (ultrasound imaging); muscle mechanical properties (Myoton technology); upper limb kinematics (Motor Task Manager); timed up and go; stair climbing; balance. Three questionnaires and one mobility assessment were administered including the health related quality of life (SF36). Four experiments tested hypotheses regarding the influence of recording conditions on mechanical properties to validate the novel MyotonPRO device. Reliability of all tests was confirmed and, as expected, data indicated reduced function with ageing (all p<0.05), with the majority showing gender differences. Some mechanical properties were significantly influenced by testing site, muscle length, contractile status and prior activity. Seven of the 25 parameters (5novel) had high discriminant ability for classifying healthy adults into age/gender groups analysed by linear discriminant function using a stepwise approach. Novel technologies, notably mechanical properties of muscle and thigh composition (relative contribution of muscle and subcutaneous fat on ultrasound scans), improved classification accuracy (from 75% to 89%) when combined with conventional tests, supporting the hypothesis and providing potential screening tools independent of participant effort. High discriminant ability (73 to 80%) was also found for classification based on functional measures. This research has advanced the approach to functional assessment and analysis by producing a comprehensive battery of non-invasive biomarkers with high discriminant ability for indicating musculoskeletal health, providing reference data for comparison with clinical populations. The most sensitive novel biomarkers did not require volition, highlighting potential powerful tests for vulnerable older people with pain or cognitive impairment.

Stephens, Aubree. "Non-motor symptoms and their use as markers for prodromal and early Parkinson's disease". Thesis, Uppsala universitet, Institutionen för organismbiologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-445208.

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Parkinson’s Disease (PD) is the second most common neurodegenerative disorder. It is a disease with a broad spectrum of symptoms, both motor and non-motor, but is often only diagnosed when the motor symptoms begin to appear. By this time however, a large amount of the dopaminergic neurons of the substantia nigra pars compacta have already deteriorated. It is therefore of great interest to be able to diagnose the disease earlier on in its progression and perhaps slow down or halt its course. Recent literature has supported the idea that non-motor symptoms begin to appear years, perhaps even decades, before the motor symptoms are visible. This makes them a prime candidate for diagnosing PD earlier on. With the aim of assessing the prevalence of different NMS in prodromal and early Parkinson’s, 19 studies addressing different NMS were analyzed. It was found that NMS are prevalent in both prodromal and early PD. The strongest prodromal predictors for PD were found to be olfactory dysfunction and REM-sleep behavior disorder (RBD).

Cantone, Mariagiovanna. "Vascular dementia: from clinical to biochemical and neurophysiological markers". Doctoral thesis, Università di Catania, 2015. http://hdl.handle.net/10761/3783.

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BACKGROUND: Vascular Dementia can be considered the second most common cause of dementia after Alzheimer s disease. However, unlike the degenerative dementias, it s possible to carry out preventive strategies. Recently, neurophysiological techniques and in particular transcranial magnetic stimulation (TMS), have been tested in patients with dementia in order to pick up early cerebral functional changes. The present research aimed to investigate cortical excitability in elderly patients with leukoaraiosis METHODS: Motor cortex excitability, intracortical inhibition and facilitation circuits and central cholinergic function were evaluated in patients with a clinical features of vascular cognitive impairment-no dementia. The neuropsychological profile and the vascular burden at brain magnetic resonance imaging were concomitantly explored. RESULTS: No differences were found for measures of motor cortex excitability between patients and controls. A significant enhancement of intracortical facilitation was observed in patients. Moreover central cholinergic circuits seem to be spared in patients. DISCUSSION AND CONCLUSION: This study provides the first evidence of functional changes in intracortical excitatory neuronal circuits in patients with vascular cognitive impairment-no dementia, a finding which is in line with previous research on vascular dementia. Central cholinergic functioning seems to be spared in patients. This functional integrity differs from that reported in patients with Alzheimer s disease or mild cognitive impairment, underlying the distinctive involvement of the cholinergic pathway in degenerative dementia and vascular form, even in their early or preclinical stage. The non-invasive evaluation of the pathophysiological and neurochemical mechanisms underlying dementia highlights the emerging role of TMS as a powerful tool in the diagnosis and management of different dementing processes.

Alessandria, Maria <1979&gt. "Sleep motor activity in parkinsonian syndromes at onset: a prospective study to determine potential diagnostic and prognostic markers". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6657/1/ALESSANDRIA_TESI.pdf.

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Aim of this study is to describe the possible diagnostic value of sleep disturbances in the differential diagnosis of neurodegenerative diseases characterized by parkinsonism at onset. 42 consecutive patients with parkinsonian features and disease duration up to 3 years were included in the BO-ProPark study. Each patient was evaluated twice, at baseline (T0) and 16 months later (T1). Patients were diagnosed as Parkinson disease (PD, 27 patients), PD plus (PD with cognitive impairment/dementia or dysautonomia, 4 patients) and parkinsonian syndrome (PS, 11 patients). All patients underwent a full night video-polysomnography scored by a neurologist blinded to the clinical diagnosis. Sleep efficiency and total sleep time were reduced in all patients; wake after sleep onset was higher in patients with atypical parkinsonisms than in PD patients. No significant differences between groups of patients were detected in other sleep parameters. The mean percentage of epochs with enhanced tonic muscle EMG activity during REM sleep was higher in PD plus and PS than in PD. No difference in phasic muscle EMG activity during REM sleep was seen between the two groups. REM behaviour disorder was more frequent in PD plus and PS than in PD patients. Our data suggest that REM sleep motor control is more frequently impaired at disease onset in patients with PS and PD plus compared to PD patients. The presence of RBD or an enhanced tonic muscle EMG activity in a patient with recent onset parkinsonian features should suggest a diagnosis of atypical parkinsonism, rather than PD. More data are needed to establish the diagnostic value of these features in the differential diagnosis of parkinsonisms. The evaluation of sleep disorders may be a useful tool in the differential diagnosis of parkinsonism at onset.

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Mollica, Maria Antonella. "Nuevos instrumentos subjetivos y objetivos para evaluar la fase preclínica de la enfermedad de Alzheimer". Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/458516.

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En la última década, frente al fracaso de los tratamientos farmacológicos para detener el proceso patológico de la enfermedad de Alzheimer, la fase preclínica se ha convertido en un importante foco de investigación, puesto que se ha postulado que la intervención temprana puede ofrecer la mejor oportunidad de éxito terapéutico. En este contexto, el enfoque de la investigación se ha ampliado desde las fases clínicas de la enfermedad hacía fases preclínicas, donde pueden aparecer tanto una percepción subjetiva de declive como posibles disfunciones cognitivas o motoras sutiles detectables por nuevos test computarizados más sensibles que las pruebas neuropsicológicas clásicas. En la presente tesis, que incluye 4 trabajos científicos, hemos desarrollado nuevos instrumentos para evaluar tanto el rendimiento subjetivo como el objetivo en la fase preclínica. En el grupo preclínico, el declive cognitivo subjetivo referido por el informador, evaluado a través del nuevo cuestionario, fue mayor que en el grupo control. Además, en comparación con el grupo control, el grupo preclínico mostró un peor rendimiento en las pruebas experimentales de coordinación visuomotora y control motor. Por último, el rendimiento en estas medidas experimentales se encontró asociado con los niveles de β-amiloide (el primer biomarcador afectado en el continuum de la enfermedad de Alzheimer) en la muestra de individuos cognitivamente sanos. Los resultados de la presente tesis sugieren que nuevas herramientas de evaluación del deterioro cognitivo subjetivo y de funciones cognitivo-motoras específicas (y quizás más cercanas y más sensibles a los precoces cambios neuronales que ocurren en la enfermedad de Alzheimer), como la velocidad y la variabilidad intra-individual, pueden ofrecer información adicional única en la identificación de individuos que presentan un substrato patológico de la enfermedad de Alzheimer, sin exhibir por ello síntomas clínicos.
In the last decade, against the failure of pharmacological treatments to stop the pathological process of Alzheimer's disease, the preclinical phase has become an important focus of research, since it has been postulated that early intervention may offer the best opportunity for therapeutic success. In this context, the research approach has expanded from the clinical phases of the disease to preclinical stages, where both subjective perception of decline and possible subtle cognitive or motor dysfunctions can be detected by new computerized tests, which may be more sensitive than classic neuropsychological measures. In the present thesis, which includes 4 scientific papers, we have developed new instruments to evaluate both subjective and objective performance in the preclinical phase. In the preclinical group, the subjective cognitive decline reported by the informant, evaluated through the new questionnaire, was greater than in the control group. In addition, compared to the control group, the preclinical group showed worse performance in the experimental tests of visuomotor coordination and motor control. Finally, performance in these experimental measures was found to be associated with the levels of β-amyloid (the first biomarker affected in the continuum of Alzheimer's disease) in the sample of cognitively healthy individuals. The results of the present thesis suggest that new tools for evaluating subjective cognitive impairment and specific cognitive-motor functions (and perhaps closer and more sensitive to the early neural changes that occur in Alzheimer's disease), such as speed and intra-individual variability, may offer unique additional information in the identification of individuals presenting a pathological substrate for Alzheimer's disease, without thereby exhibiting clinical symptoms.

Plonka, Alexandra. "Diagnostic précoce et différentiel des Aphasies Primaires Progressives : apport d'analyses motrices et langagières". Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ6015.

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L'Aphasie Primaire Progressive (APP) est un syndrome neurodégénératif caractérisé initialement par un trouble isolé du langage et dont le diagnostic est principalement clinique. Trois formes principales d'APPs sont décrites dans la littérature : l'APP logopénique (APPl), l'APP sémantique (APPvs) et l'APP non fluente/agrammatique (APPnf). Les dernières données de la littérature ont mis en évidence un diagnostic tardif, parfois erroné, associé à la nécessité d'une prise en charge précoce. La création de nouveaux outils pour le diagnostic et la classification des APPs semblent à ce jour indispensables pour une prise en charge précoce et adaptée des patients.L'objectif de cette thèse est de vérifier l'intérêt de l'analyse de marqueurs utilisant les nouvelles technologies tels que les paramètres d'activité motrice (graphique et gestuelle) et les paramètres d'activité langagière (linguistique et acoustique) au sein de l'évaluation orthophonique afin d'améliorer le diagnostic précoce et différentiel des APPs.Dans un premier temps, ce travail de thèse a permis d'analyser les spécificités du diagnostic des APPs parmi les 167 191 diagnostics enregistrés au sein de la Banque Nationale Alzheimer en France entre 2010 et 2016. Nous avons mis en évidence une errance et des erreurs de diagnostic des patients présentant une APP. Ces résultats soulignent l'importance du développement d'outils intégrables à la pratique orthophonique et permettant une meilleure précision dans le diagnostic.Suite à ces constats, dans un second temps et à travers différentes études, nous avons démontré l'intérêt de l'utilisation des nouvelles technologies facilement intégrables à une démarche diagnostique. Par l'utilisation de tablettes tactiles, nous avons démontré l'intérêt de l'analyse des paramètres graphiques, comme la pression d'écriture et les stroke, pour le diagnostic différentiel des patients atteints d'APP en comparaison avec des Malades d'Alzheimer (MA) ou de patient atteint d'Atrophie Corticale Postérieure. Ces paramètres se sont avérés également d'utilité dans une démarche de classification des trois sous-types principaux d'APPs.Pour compléter l'évaluation des stroke pour lesquels les comportements gestuels lors des temps de levers de crayons ne peuvent être récupérés directement sur tablette électronique, nous nous sommes intéressés à l'évaluation du geste d'écriture dans le cadre d'une atteinte de type APPnf. L'analyse vidéo a montré un intérêt complémentaire pour le diagnostic plus spécifique de ce variant non fluent.Dans un troisième temps, et dans une perspective d'analyse multimodale, nous avons vérifié l'intérêt de l'apport d'analyses langagière et acoustique des patients présentant une APP.Le « sentence span », épreuve de répétitions de phrases, a été utilisé pour comparer l'empan mnésique de patients atteints d'APP et de patients atteints de MA. Nos résultats ont mis en évidence un empan verbal significativement différent.L'analyse vocale a permis, au-delà du diagnostic différentiel APP/MA et via des marqueurs acoustiques temporels et prosodiques, de différencier les profils physiopathologiques des patients APPl.Enfin, dans un contexte de post-pandémie Covid-19 et plus spécifiquement du fait des troubles neurologiques constatés dans le cadre de Covid-longs, nous avons, par le biais d'une revue systématique de la littérature et d'un consensus d'experts, interrogé la pertinence de l'utilisation de ces marqueurs moteurs et langagiers pour le diagnostic précoce de la MA. En effet, les atteintes cognitives dans les Covid-longs risquent, dans le futur, de compliquer le diagnostic précoce des pathologies neurodégénératives du fait de troubles communs
Primary Progressive Aphasia (PPA) is a neurodegenerative syndrome initially characterized by an isolated language disorder and which diagnosis is mainly clinical. Three main PPA subtypes have been described in the literature: logopenic PPA (lvPPA), semantic PPA (svPPA) and non-fluent/agrammatic PPA (nfavPPA). The latest data in the literature have highlighted a late diagnosis, sometimes erroneous, associated with the need for an early medical-care management. The creation of new tools for the diagnosis and classification of PPAs seems to be crucial for an early and adapted patients' care.The objective of this thesis is to verify the interest of the analysis of markers using new technologies such as motor activity parameters (graphic and gestural) and language activity parameters (linguistic and acoustic) within the speech therapy evaluation, to improve the early and differential diagnosis of PPAs.Initially, this thesis work made it possible to analyze the specificities of the PPA diagnosis among the 167,191 diagnoses recorded in the French National Alzheimer Bank between 2010 and 2016. We highlighted diagnostic wavering and misdiagnosis of patients with PPA. These results underline the importance of developing tools that can be integrated into speech therapy practice and that can allow a greater accuracy in diagnosis.Following these observations, we have demonstrated the interest of using new technologies that can be easily integrated into a diagnostic approach. By using touch tablets, we have demonstrated the interest of the analysis of graphic parameters, such as writing pressure and strokes, for the differential diagnosis of PPA patients in comparison with patients with Alzheimer's Disease (AD) or patient with Posterior Cortical Atrophy. These parameters have also proven to be useful in the classification of the three main subtypes of PPA.To complete the evaluation of strokes for which the gestural behaviors during the pencil lifting times cannot be directly recovered on an electronic tablet, we were interested in the evaluation of the writing gesture in the context of a nfavPPA type of impairment. The video analysis showed a complementary interest for the more specific diagnosis of this non-fluent variant.In a third step, and in a perspective of multimodal analysis, we verified the interest of the contribution of language and acoustic analyses of patients with PPA.The ‘sentence span' test was used to compare the memory span of PPA and AD patients. Our results showed a significantly different verbal span.The vocal analysis allowed us, beyond the differential diagnosis PPA/AD and via temporal and prosodic acoustic markers, to differentiate the physiopathological profiles of lvPPA patients.Finally, in a post-Covid-19 pandemic context and more specifically because of the neurological disorders observed in post-acute Covid-19 syndrome, we questioned, through a systematic review and an experts' consensus, the relevance of using these motor and language markers for the early diagnosis of AD. Indeed, cognitive impairments in post-acute Covid-19 syndrome may, in the future, complicate the early diagnosis of neurodegenerative diseases due to common disorders

CRIPPA, ALESSANDRO. "MOTOR IMPAIRMENTS AS A BIO-BEHAVIORAL MARKER OF AUTISM SPECTRUM DISORDER". Doctoral thesis, Università degli Studi di Milano-Bicocca, 2018. http://hdl.handle.net/10281/199065.

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I Disturbi dello Spettro Autistico (in inglese Autism Spectrum Disorders, ASD) rappresentano un insieme di disturbi del neurosviluppo fortemente eterogenei nella loro manifestazione, con una molteplicità di cause, differenti percorsi evolutivi e livelli di compromissione funzionale. L’alta ereditarietà degli ASD porta a considerare una forte implicazione di fattori genetici nella sua eziologia, ma l’ampia eterogeneità clinica all’interno del fenotipo comportamentale risulta essere un importante ostacolo nell’identificazione dei geni coinvolti. Inoltre, la eterogeneità tipica degli ASD rende estremamente difficoltosa la ricerca di trattamenti personalizzati e di una medicina di precisione. A partire da queste considerazioni, negli ultimi anni si è sviluppata una crescente richiesta di sviluppare marcatori affidabili per un disturbo come ASD, attualmente diagnosticato sulla base di una valutazione clinica dei sintomi. Lo scopo del presente progetto è stato quello di fornire ulteriori evidenze scientifiche in supporto dell’utilizzo di deficit motori come marcatore comportamentale e biologico degli ASD. Le difficoltà motorie sono infatti una delle caratteristiche più frequentemente associate al disturbo, con un’importante prevalenza ed un impatto significativo sulla qualità della vita e sullo sviluppo sociale del bambino. Precisamente, in questa tesi abbiamo indagato il pattern di cammino e l’adattamento motorio ad una perturbazione discreta in bambini con ASD usando una innovativa piattaforma integrata basata su realtà virtuale immersiva (Cap. 1). Abbiamo inoltre sviluppato un metodo di classificazione basato su un approccio machine learning per confrontare la cinematica del movimento di raggiungimento ed inserimento di una pallina in bambini con e senza ASD (Cap. 2). Infine, usando l’imaging di diffusione del tensore (DTI), abbiamo esplorato l’ipotesi di una ridotta conettività a lungo raggio tra le regioni cerebrali frontali e posteriori, dato il ruolo cruciale di tali connessioni in funzioni quali il linguaggio, la prassia, l’imitazione e la coordinazione motoria (Cap. 3). I risultati hanno mostrato un pattern di cammino alterato in bambini con ASD e minore adattamento alla perturbazione. Tale ridotto livello di adattamento è risultato relato in modo significativo a una maggior gravità della sintomatologia autistica. Relativamente alla classificazione basata su cinematica, il nostro metodo machine-learning si è dimostrato efficace nel discriminare bambini con ASD da bambini con sviluppo tipico con un’accuratezza media pari al 84.9%. L’identificazione di queste caratteristiche potrebbe essere potenzialmente utile nel supportare e facilitare le diagnosi clinica dei Disturbi dello Spettro Autistico. Infine lo studio DTI ha rivelato alterazioni nella diffusività della materia bianca a livello del fascicolo longitudinale superiore sinistro in un gruppo di bambini con ASD ad alto funzionamento. Nel complesso, i risultati della presente tesi supportano l’ipotesi di un possibile marcatore motorio di ASD multi-dominio (i.e., comportamentale, computazionale e di neuroimmagine), potenzialmente utile per identificare specifico endofenotipo all’interno della sindrome autistica. Tale caratterizzazione può aumentare sensibilmente il potere predittivo di indagini rispetto modelli eziopatogenetici del disturbo, mediante studi di neuroimmagine e analisi genetica.
Autism Spectrum Disorder (ASD) is a highly heterogeneous neurodevelopmental disorders with multiple causes, courses, and a wide range in symptom severity. Although the etiology of the disorder is generally considered multifactorial, high heritability estimates suggest a critical role for genetic factors. However, the notable clinical heterogeneity within the broad behavioral phenotype has been a major obstacle to gene identification. Furthermore, the hallmark heterogeneity of ASD makes the quest for personalized treatment and potential precision medicine inherently difficult. Starting from these considerations, in the last years there has been an increasing need for developing a reliable marker for ASD, currently diagnosed on the basis of the clinical judgment of symptoms. The purpose of the present project was to provide further evidence supporting the use of motor impairments as a bio-behavioral marker of ASD. Indeed, abnormalities in motor behavior are one of the features most frequently associated to the disorder and can have a significant impact on quality of life and social development. Specifically, in this thesis we investigated the gait pattern and the motor adaptation to discrete gait perturbations in school-aged children with ASD using an innovative multi-sensor platform based on immersive virtual reality (Chapter 1). Further, we developed a supervised machine-learning method to identify and correctly discriminate preschool children with ASD from typically developing children by means of kinematic analysis of a simple reach, grasp and drop task (Chapter 2). Finally, using diffusion tensor imaging (DTI), we explored the hypothesis of reduced long-range connectivity between frontal lobes and posterior brain regions in ASD given the key role of these pathways for language, praxis, imitation, and basic motor coordination (Chapter 3). Results highlighted an altered gait pattern in children with ASD and slower rates of adaptation to the perturbation. Diminished learning adaptation was also significantly related with more severe autistic traits. With respect to classification based on kinematics analysis, our machine-learning method reached a good mean individual classification in the comparisons between children with ASD and healthy controls (overall mean accuracy = 84.9%). Thus, we demonstrated that machine-learning classification approach might be helpful for supporting the clinical practice of diagnosing ASD, even fostering a computer-aided diagnosis perspective. Last, the DTI study provided evidence for alterations in white matter diffusivity of the left superior longitudinal fasciculus in a well-characterized group of high-functioning children with ASD. All in all, our findings offer insight on a possible, multi-domain (i.e., behavioral, computational, and imaging) motor signature of autism that is potentially useful to identify a well-defined subset of patients, thus reducing the clinical heterogeneity within the broad behavioral phenotype. This may guide further exploration of neuropathology of the disorder adding power to genetic analysis.

Oliveira, Alessandro V. M. "Three essays on competition in airline markets with recent liberalisation". Thesis, University of Warwick, 2004. http://wrap.warwick.ac.uk/2627/.

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This thesis aims at investigating the behaviour of airlines in recently liberalised markets, by making use of the Brazilian air transportation as a case study. In order to accomplish this objective, the following three essays were developed: a study of low cost carrier entry behaviour, an analysis of the pricing behaviour of the major incumbents in the industry, and, finally, an assessment of airline conduct in the most important market in the country. All essays contain empirical investigation performed by making use of data supplied by Brazil’s Department of Civil Aviation, DAC. In the first essay, the entry of Gol Airlines on several Brazilian domestic routes, in 2001 and 2002, is analysed in order to draw inference on the competition between a discounter in rapid expansion and the full-service carriers. A route-choice model is estimated by making use of a flexible post-entry equilibrium profits equation and accounting for endogeneity of the main variables. The second essay aims at empirically investigating the pricing behaviour of the legacy carriers in Brazil, with special focus on reactions to the entry of Gol, in 2001. A study of localised competitive advantage regarding the determinants of pricing power is performed along with the analysis of the pattern of price reactions by the incumbents. A single econometric framework is designed and estimated with panel data controlling for city-specific effects. And finally, the third essay aims at assessing the impacts of economic liberalisation on the route Rio de Janeiro - São Paulo. By making use of both a two-stages budgeting representation of the demand system, and a competition model with product heterogeneity among rivals, and based on the framework of the New Empirical Industrial Organisation, it was possible to examine the existence of a structural change on airlines’ conduct parameters due to the regulatory reform.

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Libros sobre el tema "Motor markers":

United States. Federal Highway Administration. Study of the feasibility and desirability of using motor fuel dyes and markers. [Washington, D.C.]: U.S. Dept. of Transportation, Federal Highway Administration, 1993.

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Dooley-Awbrey, Betty. Why stop?: A guide to Texas historical roadside markers. 3^a ed. Houston, Tex: Gulf Pub., 1992.

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(Firm), Leading Edge Reports, ed. Fractional horsepower motor markets. Cleveland Hts., OH: Leading Edge Reports, 1990.

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Inc, Wisconsin Demand-Side Demonstrations y Canyon Research Group, eds. RPM-Motors program: Feedback from motor vendors. Madison, Wis: Wisconsin Demand-Side Demonstrations, Inc., 1995.

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Inc, Easton Consultants, ed. Strategies to promote energy-efficient motor systems in North America's OEM markets: Final report. [Stamford, CT]: Easton Consultants, Inc., 1995.

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(Firm), Motor Tech Trends, ed. Step motors and step motor amplifiers: A competitive scenario, 1986, 1987 & 1992. [U.S.A.]: Motor Tech Trends, 1989.

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Forman, J. Charles. Reformulated motor gasoline: Markets, technologies, industry ramifications. Norwalk, CT: Business Communications Co., 1995.

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(Firm), Motor Tech Trends, ed. DC brushless motion technology: A U.S. market and technical forecast, 1986-1991. [United States]: Motor Tech Trends, 1987.

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Hester, Edward, Michael A. Deneen y Sean T. Socha. Fractional horsepower motors. Cleveland: Freedonia Group, 1999.

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Canada. Canadian Oil Markets and Trade Division., ed. Canadian motor gasoline markets: 1980s, the decade in review. [Ottawa]: Canadian Oil Markets & Trade Division, Energy, Mines and Resources Canada, 1989.

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Capítulos de libros sobre el tema "Motor markers":

Reine, Preston. "A Global Update on the Markets for Motors, Drives, and Motor-Driven Equipment". En Springer Proceedings in Energy, 29–36. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69799-0_3.

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Monkiewicz, Marek y Adam Śliwiński. "Telematics in motor insurance". En The Digital Revolution in Banking, Insurance and Capital Markets, 164–89. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003310082-15.

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Lo, Dic. "The Motor Industry: Institutional Reform and Development". En Market and Institutional Regulation in Chinese Industrialization, 1978-94, 172–98. London: Palgrave Macmillan UK, 1997. http://dx.doi.org/10.1057/9780230379459_7.

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Humphrey, John y Antje Oeter. "Motor Industry Policies in Emerging Markets: Globalisation and the Promotion of Domestic Industry". En Global Strategies and Local Realities, 42–71. London: Palgrave Macmillan UK, 2000. http://dx.doi.org/10.1057/9780333977712_3.

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Dubin, Jeffrey A. "The World Demand for Fractional Horsepower Direct-Current Motors". En Studies in Consumer Demand — Econometric Methods Applied to Market Data, 27–59. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5665-7_2.

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Goletz, Mirko, Daniel Ehebrecht, Christian Wachter, Deborah Tolk, Barbara Lenz, Meike Kühnel, Frank Rinderknecht y Benedikt Hanke. "Electrification of Urban Three-Wheeler Taxis in Tanzania: Combining the User’s Perspective and Technical Feasibility Challenges". En Small Electric Vehicles, 97–112. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-65843-4_8.

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AbstractThis study assesses the feasibility of electric three-wheelers as moto-taxis in Dar es Salaam, Tanzania from a socioeconomic and technical point of view. The analysis is based on three pillars: (i) the acceptance of users (the moto-taxi drivers) for adoption, (ii) the vehicle specifications incl. battery type and size, and (iii) the role of the charging infrastructure. Findings are based on data from empirical field-work; methods used are qualitative and quantitative data analysis and modelling. Main findings include that moto-taxi drivers, who we see as most important adopters, are open towards electric mobility. They request however that vehicles should have similar driving characteristics than their current fuel-vehicles. As the market is very price sensitive, keeping the vehicle cost is of high importance. A high potential to lower these costs is seen by offering opportunity charging spots around the city. If such an infrastructure is being implemented the combination with suitable, cost competitive vehicles makes the transformation of the vehicle market towards electrification possible.

Karthik, S. y M. Sudha. "A Regularization-Based Feature Scoring Criterion on Candidate Genetic Marker Selection of Sporadic Motor Neuron Disease". En Advances in Intelligent Systems and Computing, 321–29. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5679-1_30.

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Dato, Moïra y Pascale Gorguet-Ballesteros. "Lyonnais silks «ad uttimo gusto»: the trade in fashionable waistcoats between France and Italy in the second half of the 18th century". En La moda come motore economico: innovazione di processo e prodotto, nuove strategie commerciali, comportamento dei consumatori / Fashion as an economic engine: process and product innovation, commercial strategies, consumer behavior, 173–200. Florence: Firenze University Press, 2022. http://dx.doi.org/10.36253/978-88-5518-565-3.12.

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Throughout the 18th century, Lyonnais silk manufacturing was constantly creating, adapting and transforming products in response to the evolution of fashion, which was both a profitable tool and a turbulent stream to harness. The male waistcoat is an excellent example of the difficult exercise in which merchant manufacturers engaged in order to secure their markets. Although not originally a specialty of the French city, the waistcoat eventually became a key item in Lyonnais production, selling very successfully in France and abroad. In this article, we analyse trade with Italy in order to explore in detail how the Lyonnais adapted to changes in fashion and used them to their advantage in order to stimulate consumption while navigating the challenges of a foreign market.

Mattioli, Giulio, Marco Dugato y Ian Philips. "Vulnerability to Motor Fuel Price Increases: Socio-Spatial Patterns in Italy". En Studies in Energy, Resource and Environmental Economics, 89–115. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-35684-1_5.

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AbstractEnvironmental taxes and oil market fluctuations can increase road fuel prices significantly and are likely to play a big role in the future. This raises social justice issues, as some low-income households rely on cars for access to services and opportunities but struggle to afford related expenses. The impacts of fuel price increases are unevenly spatially distributed, as shown by transport, planning and urban research. We investigate spatial patterns of vulnerability to fuel price increases in Italy, a country where the problem is particularly pronounced due to high motorisation rate relative to income, and high fuel prices. We define vulnerability as the combination of high exposure (high car use), high sensitivity (low income) and low adaptive capacity (high car dependence). Based on municipality-level data on motorisation and the journey to work from the 2011 Italian Census and official income tax revenue data for 2012 (as a proxy for income) we derive a composite indicator of vulnerability. The results show: i) a co-location of low-income and high car use on the periphery of many Italian city regions; ii) stark interregional differences, with lower income levels in the South driving high levels of vulnerability, despite lower levels of car ownership and use.

Teixeira, Antonio L., Isabelle Bauer, Akif Camkurt y Sudhakar Selvaraj. "Investigating Immune Changes in the Psychiatric Patients". En Immunopsychiatry, 127–40. Oxford University Press, 2018. http://dx.doi.org/10.1093/med/9780190884468.003.0007.

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Among potential biomarkers in psychiatry, immune markers have been regarded as very promising due to the role played by the immune system in the physiopathology of psychiatric disorders and the relatively easy access to them. The most studied immune markers are C-reactive protein (CRP), the cytokines TNF-α‎, interleukin 1 beta (IL-1β‎), IL-6, IL-8, IL-10, and the neutrophil:lymphocyte ratio. These markers lack specificity; therefore, they are not useful as diagnostic markers. Overlapping inflammatory markers across psychiatric disorders point to a likely common and/or shared immune dysfunction. Regarding diagnosis, anti-NMDA antibodies seem to be promising, being able to identify a group of patients experiencing an acute neuropsychiatric syndrome marked by psychosis and motor signs. Beyond psychiatric diagnoses, immune markers have been evaluated as risk, subgroup, and treatment-response markers.

Actas de conferencias sobre el tema "Motor markers":

Daunoraviciene, Kristina, Jurgita Ziziene, Julius Griskevicius, Rasa Kizlaitiene y Agne Ovcinikova. "Biomechanical markers of impaired motor coordination". En 2020 Mechatronics Systems and Materials (MSM). IEEE, 2020. http://dx.doi.org/10.1109/msm49833.2020.9201642.

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Smith, Kara M., James R. Williamson y Thomas F. Quatieri. "Vocal markers of motor, cognitive, and depressive symptoms in Parkinson's disease". En 2017 Seventh International Conference on Affective Computing and Intelligent Interaction (ACII). IEEE, 2017. http://dx.doi.org/10.1109/acii.2017.8273581.

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Yagubov, V. S., N. R. Memetov, V. K. Nagdaev, E. V. Galunin y A. G. Tkachev. "Application of carbon nanomaterials as markers in the composition of motor oils". En PROCEEDINGS OF THE ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES. Author(s), 2018. http://dx.doi.org/10.1063/1.5083570.

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Verma, Rubal, Devendra Bonde, Nitin Sehgal, Hrishi Singh y Jay Sharma. "Self-Operated Solar Side Marker for Commercial Vehicles". En WCX SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2463.

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<div class="section abstract"><div class="htmlview paragraph">In response to Federal Motor Vehicle Safety Standard 108, Side Marker lamps were equipped in both passenger and commercial vehicles. Side marker lights are designed to provide clear visibility and vehicle identification from side way to other drivers/passersby vehicles traveling in perpendicular directions. But in case of harness failure/any malfunctioning/improper maintenance post damages etc., the side marker lamp does not illuminate when it is critically required. This causes serious accidents or loss of human beings as well. Convention side markers are powered by vehicle battery; a solar side-marker operates independently using a photometric switch that activates the light at sunset using stored solar energy. This device mainly works on natural light intensity when it lowers than specific value, the solar energy stored inside device will automatically ignite the side markers, irrespective of manual human intervention to switch it on. In case of a vehicle battery cut-off during vehicle parking, breakdown or accidental case, solar side marker run by an integrated rechargeable battery. It is charged by vehicle power or solar power and operated by photo switch. No similar option is available for commercial vehicles. The battery has a twin mode charging system so that it is foolproof in all weather conditions. Keeping in mind human safety, this invention may leads to reduced accidents on roads due to proper visibility of side markers in any adverse conditions.</div></div>

Sharova, Elena, Galina Boldyreva, Lyudmila Zhavoronkova, Alexander Smirnov, Tatyana Mukhina, Yuliya Kotovich, Marina Chelyapina et al. "ANALYSIS OF FMRI AND EEG MARKERS OF MOTOR ACTIVITY IN PATIENTS WITH SEVERE TRAUMATIC BRAIN INJURY". En XIV International interdisciplinary congress "Neuroscience for Medicine and Psychology". LLC MAKS Press, 2018. http://dx.doi.org/10.29003/m202.sudak.ns2018-14/530-531.

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Kolesovs, Aleksandrs, Klavs Evelis, Liga Ozolina-Molla, Liga Plakane, Juris Porozovs y Viktors Veliks. "Exploration of EEG Markers of Sensorimotor Functioning During Incorrect versus Correct Decisions". En 81th International Scientific Conference of the University of Latvia. University of Latvia Press, 2023. http://dx.doi.org/10.22364/htqe.2023.42.

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Open-skill sports are demanding for athletes’ decision-making. Incorrect decisions can have substantial consequences. Complex programs for elite athletes include improvement of their neurocognitive functioning. Simultaneously, making errors remains underrepresented in broader sports science. The present study explored EEG markers of sensorimotor reactions under incorrect versus correct responses to visual stimuli. Seven male participants (24.2±2.5 years) completed the Choice Response Time task (CRT) with simultaneous EEG registration. Two color stimuli (red and green) and a discriminative stimulus (black) were presented on an LCD screen, using PSYCHOTOOLBOX coded CRT task. Stimulus and response events were synchronized with EEG amplifier NVX-136, and 32 channels of EEG were recorded. Data were preprocessed in EEGLAB, and event-related potential (ERP) calculations were performed in ERPLAB. ERP was analyzed for correct and incorrect color choices and reactions to the discriminative stimulus. The electrodes represented the visual (O1, Oz, O2), frontal (F3, Fz, F4), and sensorimotor (C3, Cz, C4) cortex. Behavior data revealed a shorter reaction time during the incorrect decision (4.6% of cases) than during the correct one, 398.1±55 ms vs. 456.8±96 ms. In the N2 peak area, the incorrect color stage differed significantly from the two correct stages (e.g., the amplitude of -1.624 mkV at a latency of 264 ms for the correct color stage and -1.779 mkV at a latency of 254 ms for the correct discriminating stage vs. -3.716 mkV at a latency of 300 ms for the incorrect color stage for channel F3, peak N2). Correct decision stages had similar ERP wave peak patterns. Incorrect decisions deviate from functioning during correct ones. Differences in the N2 peak area represented conflict in decision-making during incorrect decisions. Simultaneously, the shorter latency of a motor reaction requires investigating the role of decision-making conflicts in impulse control and behavioral consequences.

Novais, Aurea Maria Lago y Renan Carvalho Castello Branco. "Mechanisms of Neuroplasticity After Pediatric Stroke: A Review". En XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.241.

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Introduction: Stroke in childhood constitute a rare event and its incidence is increasing due to advances in neuroimaging.This study clarifies anatomic and molecular mechanisms involved in neuroplasticity after children stroke, demonstrating its specificities in motor,somatosensory and language habilities. Methods: We used database, from 2000 to march 2021,of SpringerLink,NEJM,PubMed, AHA (Stroke),Scielo,VHL and JAMA.The research was based in the keywords “neuplasticity”, “stroke” and “children”; 57 were selected including original articles, case reports and reviews, considering abstract according to the objective of the present study and methodologies that satisfy criterias of cientific valuation, considering p <0,005 as statistical significance. Results: Reduction of ipsilesional cortex and better prognosis between the ages of 1 and 6 years were observed. About motor function, it was found persistence of some perilesionais circuits, contralateral reorganization with increasing activation of suplementary motor area, unbalance of intrahemisferics inhibitory mechanisms, increase of excitability and changes in the concentration of N-acetyl-aspartate, choline, myo-inositol and creatine. Somatosensory skills presented limited plasticity. Contralesional alterations in arched fasciculi and temporoparietal area, circuit remodelation and compromissing of complex cognitive functions were observed for language habilites. Conclusion: Better outcomes in the ages of 1 to 6 years demonstrate the duality between early vulnerability and early plasticity. The plasticity of motor system demonstrates therapeutic targets and potencial rehabilitation markers; otherwise, the limited potencial of somatossensorial habilities indicates its premature determination. Language skills presented limited prognosis.

Stefanov, Zdravko, Antonio Antonov, Dimitar Zagorski, Galina Rusimova, Ivan Ivanov y Ognyan Tishinov. "AN EXPLORATIVE STUDY OF THE DEPENDABILITY OF THE EXECUTION ON ROUTINE SCORING GOAL IN FIELD HOCKEY". En INTERNATIONAL SCIENTIFIC CONGRESS “APPLIED SPORTS SCIENCES”. Scientific Publishing House NSA Press, 2022. http://dx.doi.org/10.37393/icass2022/33.

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ABSTRACT Biomechanical analyzes of field hockey players have been developed. The analysis was made for shooting in the door by video recording from two high-speed video cameras. For each of the blows with the stick, kinematic analyzes were made both from a point of view in a direction perpendicular to the plane of the blow on the ball, and from a rear point of view relative to the athlete. The aim of the development is to establish significant statistical regularities accompanying the repeatability of the stability of the motor habit in the effective execution of the blows on the ball in the hockey goal. Methods The scale of the shooting covers the athlete in general shooting. 8 control markers placed on the front of the stick, the right wrist, the right elbow, the right shoulder, the right and left knees, the right and left feet were used in the video recording from the lateral point of view. The same model for marking control markers is used when shooting the athlete from a rear view. The criterion for the selection of the studied points is to be visible when shooting. Additional lighting is used to increase the contrast required for automated kinematic analysis. Results and analysis Statistical analyzes of the shocks during the shooting were made, including the limit values of the linear velocities of the examined points by the athlete’s body during the execution of the shot in the door. The statistical processing includes variation, correlation, regression and anatomical analyses establishing the stability of the motor habit when performing the stroke by different athletes from the national hockey team. Statistically significant correlation and regression models were established connecting the instantaneous velocity of the blow with the stick on the hockey ball and the instantaneous values of the examined points of the athlete’s body.

Radcliffe, Clark. "An Analytical Mechatronic Model for Series DC Motors Using Manufacturer Test Data". En ASME 2009 Dynamic Systems and Control Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/dscc2009-2549.

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Direct Current (DC) Motors are one of the most common mechatronic actuators. They are important for electromechanical servo systems, drivers for battery powered appliances and tools as well as electric vehicles. Both brushless DC motors and wound DC motors are common in electric and hybrid vehicles. The series wound DC motor is commonly used for high torque vehicle applications. The literature has many papers discussing permanent magnet DC motors but a very limited number of publications on analytical models for series wound DC motors, especially motor models that fit series wound DC motor test data available in the market place. An analytical model for a series wound DC motor is developed here based on physical principles including energy conservation. The model developed will be compared with models developed by other investigators. Available commercial test data for a series motor will be used to find model parameters for the analytical model and the accuracy of this model evaluated against the original test data. The model developed displays excellent accuracy well within the accuracy of the test data available. Typical model rms deviation from test data is under 2% for the commercial series wound DC motors evaluated.

Fulbright, Nathaniel J., Grey C. Boyce-Erickson, Thomas R. Chase, Perry Y. Li y James D. Van de Ven. "Automated Design and Analysis of a Variable Displacement Linkage Motor". En ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1677.

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Abstract Hydrostatic drives consisting of a variable displacement pump and a low speed high torque (LSHT) motor are frequently used in off-highway vehicles. A variable displacement traction motor is desirable because of the ability to downsize the pump and thereby run the hydrostat at higher efficiency, as well as the possibility of hybridization of the drivetrain. Currently on the market are fixed and discrete speed LSHT radial piston motors and high speed low torque variable displacement axial piston motors. The radial piston motors are displacement dense but are not continuously variable, whereas the axial piston motors are continuously variable but require gearboxes, introducing packaging and robustness concerns. The Variable Displacement Linkage Motor (VDLM) is a LSHT motor that is continuously variable. It offers several benefits over current LSHT motors in that it is highly efficient over its operating range, it has low torque ripple, and it is displacement dense due to its multi-lobed cam and radial packaging. As with the design of any motor, the process is iterative and must be performed whenever performance objectives change. This paper describes an automated method for rapid exploration of the solution space for a variable displacement motor with specific application to the VDLM. This method leads to a motor design that theoretically can achieve 97% efficiency with a torque ripple below 5% at full displacement.

Informes sobre el tema "Motor markers":

Zhang, Yu, Chaoliang Sun, Hengxi Xu, Weiyang Shi, Luqi Cheng, Alain Dagher, Yuanchao Zhang y Tianzi Jiang. Connectivity-Based Subtyping of De Novo Parkinson Disease: Biomarkers, Medication Effects and Longitudinal Progression. Progress in Neurobiology, abril de 2024. http://dx.doi.org/10.60124/j.pneuro.2024.10.04.

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Parkinson's disease (PD) is characterized by divergent clinical symptoms and prognosis, suggesting the presence of distinct subtypes. Identifying these subtypes is crucial for understanding the underlying pathophysiology, predicting disease progression, and developing personalized treatments. In this study, we propose a connectivity-based subtyping approach, which measures each patient's deviation from the reference structural covariance networks established in healthy controls. Using data from the Parkinson's Progression Markers Initiative, we identified two distinct subtypes of de novo PD patients: 248 patients with typical cortical-striato-thalamic dysfunctions and 41 patients showing weakened dorsal raphe nucleus (DRN)-to-cortical/striatal projections. The proposed subtyping approach demonstrated high stability in terms of random sampling of healthy or diseased population and longitudinal prediction at follow-up visits, outperforming the traditional motor phenotypes. Compared to the typical PD, patients with the DRN-predominant subtype were characterized by less server motor symptoms at baseline and distinct imaging biomarkers, including larger striatal volumes, higher concentration of cerebrospinal fluid amyloid-β and amyloid-β/t(p)-tau ratio. Subtype-specific associations and drug effects were identified that the DRN subtype exhibited more pronounced medication effects on motor symptoms, potentially regulated by DRN serotonergic modulation through striatal dopaminergic neurons. The DRN serotonergic inputs also regulated non-motor symptoms, the aggregation of CSF biomarkers and the conversion to more severe disease states. Our findings suggest that the DRN-predominant subtype represents a unique clinical and biological phenotype of PD characterized by an enhanced response to anti-parkinsonian treatment, more favorable prognosis and slower progression of dopamine depletion. This study may contribute to clinical practice of precision medicine, early invention and individualized treatments in PD and other neurodegenerative diseases.

Newkirk, Alex, Prakash Rao y Paul Sheaffer. U.S. Industrial and Commercial Motor System Market Assessment Report Volume 2: Advanced Motors and Drives Supply Chain Review. Office of Scientific and Technical Information (OSTI), junio de 2021. http://dx.doi.org/10.2172/1822412.

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None, None. United States industrial electric motor systems market opportunities assessment. Office of Scientific and Technical Information (OSTI), diciembre de 2002. http://dx.doi.org/10.2172/1215858.

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Hu, P. S. Motor vehicle MPG and market shares report: model year 1985. Office of Scientific and Technical Information (OSTI), febrero de 1986. http://dx.doi.org/10.2172/6089260.

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None, None. United States industrial electric motor systems market opportunities assessment: Executive summary. Office of Scientific and Technical Information (OSTI), diciembre de 1998. http://dx.doi.org/10.2172/1215865.

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Rao, Prakash, Paul Sheaffer, Yuting Chen, Unique Karki y patrick Fitzgerald. U.S. Industrial and Commercial Motor System Market Assessment Report Volume 3: Energy Saving Opportunity. Office of Scientific and Technical Information (OSTI), julio de 2022. http://dx.doi.org/10.2172/1876861.

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Leiby, P. N. A methodology for assessing the market benefits of alternative motor fuels: The Alternative Fuels Trade Model. Office of Scientific and Technical Information (OSTI), septiembre de 1993. http://dx.doi.org/10.2172/10186937.

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Rao, Prakash, Paul Sheaffer, Yuting Chen, Miriam Goldberg, Benjamin Jones, Jeff Cropp y Jordan Hester. U.S. Industrial and Commercial Motor System Market Assessment Report Volume 1: Characteristics of the Installed Base. Office of Scientific and Technical Information (OSTI), enero de 2021. http://dx.doi.org/10.2172/1760267.

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Unzeta, Bruno Bueno, Jan de Boer, Ruben Delvaeye, Bertrand Deroisy, Marc Fontoynont, Daniel Neves Pimenta, Per Reinhold, Sophie Stoffer y Robert Weitlaner. Review of lighting and daylighting control systems. IEA SHC Task 61, febrero de 2021. http://dx.doi.org/10.18777/ieashc-task61-2021-0003.

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There is a large number of control systems proposed either by lighting manufacturers or motor manufacturers for shading systems. In addition there are many other solutions proposed by specific manufacturers of Building Management Systems (BMS) or manufacturers of components to be installed in luminaires and switches, as well as in the electric lighting architecture (transformers, gateways to the internet, sensors, etc.). For many consumers -i.e.-the installer, the facility manager, or the final user (building occupant) – this forms a complex and dynamic market environment with high frequent changes, every year or even every month or day. In this report we aim to provide some basic strategic information, showing the status of the supply at the time this report was written (2019-2021). Although the market develops very fast, there are principles of controls which are rather independent of the progress of technology.

Li, Yan, Yuhao Luo y Xin Lu. PHEV Energy Management Optimization Based on Multi-Island Genetic Algorithm. SAE International, marzo de 2022. http://dx.doi.org/10.4271/2022-01-0739.

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The plug-in hybrid electric vehicle (PHEV) gradually moves into the mainstream market with its excellent power and energy consumption control, and has become the research target of many researchers. The energy management strategy of plug-in hybrid vehicles is more complicated than conventional gasoline vehicles. Therefore, there are still many problems to be solved in terms of power source distribution and energy saving and emission reduction. This research proposes a new solution and realizes it through simulation optimization, which improves the energy consumption and emission problems of PHEV to a certain extent. First, on the basis that MATLAB software has completed the modeling of the key components of the vehicle, the fuzzy controller of the vehicle is established considering the principle of the joint control of the engine and the electric motor. Afterwards, based on the Isight and ADVISOR co-simulation platform, with the goal of ensuring certain dynamic performance and optimal fuel economy of the vehicle, the multi-island genetic algorithm is used to optimize the parameters of the membership function of the fuzzy control strategy to overcome it to a certain extent. The disadvantages of selecting parameters based on experience are compensated for, and the efficiency and feasibility of fuzzy control are improved. Finally, the PHEV vehicle model simulation comparison was carried out under the UDDS working condition through ADVISOR software. The optimization results show that while ensuring the required power performance, the vehicle fuzzy controller after parameter optimization using the multi-island genetic algorithm is more efficient, which can significantly reduce vehicle fuel consumption and improve exhaust emissions.