Dissertations / Theses on the topic 'Neurostimulator'
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Suaning, Gregg J????rgen Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Engineering and acute physiological testing of a retinal neurostimulator." Awarded by:University of New South Wales. Graduate School of Biomedical Engineering, 2003. http://handle.unsw.edu.au/1959.4/19203.
Full textShafquat, Afsah. "Design and validation of chronic research tools for an implantable closed-loop neurostimulator." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/66809.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 119-120).
Neurostimulators today provide high frequency Deep Brain Stimulation (DBS) for therapeutic modulation of diseased neural circuits. These devices are approved for the treatment of Parkinson's Disease, Essential Tremor and Dystonia, and are in clinical evaluations for Epilepsy and Depression. Despite the success of DBS therapy, the current systems are open-loop, where the clinician is the sensor and control algorithm, and hence these are programmed with stimulation parameter settings based on acute clinical observations. The need to move towards an effective closed-loop system drives the research for understanding the dynamics of the neural circuits. This work assessed the feasibility of use of a unique implantable research tool, which has sensing and algorithm technology added to an existing DBS device, for a chronic, in-vivo study of the brain state dynamics in an ovine model and presented preliminary validation of the neural interface. In addition, the sensing technology of this bi-directional neural interface was also validated using data from Brain Machine Interface studies. Finally, the work also involved development of a software tool which is a platform for analyzing neural activity datasets from different studies using machine learning techniques.
by Afsah Shafquat.
M.Eng.
Dommel, Norbert Brian Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "A vision prosthesis neurostimulator: progress towards the realisation of a neural prosthesis for the blind." Publisher:University of New South Wales. Graduate School of Biomedical Engineering, 2008. http://handle.unsw.edu.au/1959.4/41249.
Full textErbslöh, Andreas [Verfasser], and Rainer [Akademischer Betreuer] Kokozinski. "CMOS-Schaltungskonzepte für die bidirektionale Kommunikation zwischen einem Neurostimulator und der degenerierten Netzhaut / Andreas Erbslöh ; Betreuer: Rainer Kokozinski." Duisburg, 2021. http://d-nb.info/1241044805/34.
Full textAl-Qadhi, Safwan [Verfasser], Wolfgang [Gutachter] Walkowiak, and Mohammad [Gutachter] Maarouf. "A Demand-Controlled Application of Deep Brain Stimulation with a Portable Neurostimulator / Safwan Al-Qadhi ; Gutachter: Wolfgang Walkowiak, Mohammad Maarouf." Köln : Universitäts- und Stadtbibliothek Köln, 2021. http://d-nb.info/1234655128/34.
Full textRaffini, Alessandra. "Neurostimolatore impiantabile per il trattamento di epilessia farmaco-resistente." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19368/.
Full textD'URSO, ELISA SILVIA. "ADVANCEMENTS IN ULTRASOUND-GUIDED, NEUROSTIMULATED AND BLIND APPROACHES TO LOCOREGIONAL ANAESTHESIA IN COMPANION ANIMALS." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/627008.
Full textDougherty, Edward T. "Computation and Numerics in Neurostimulation." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/73350.
Full textPh. D.
Youra, Sean. "Investigating Hemodynamic Responses to Electrical Neurostimulation." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1285.
Full textUlrich, Philip I. N. "Behavioural, electrophysiological and neurostimulatory investigations into developmental prosopagnosia." Thesis, University of Kent, 2017. https://kar.kent.ac.uk/61343/.
Full textWong, Yan Tat Graduate School of Biomedical Engineering Faculty of Engineering UNSW. "Effects of neurostimulation via a suprachoroidal vision prosthesis." Publisher:University of New South Wales. Graduate School of Biomedical Engineering, 2009. http://handle.unsw.edu.au/1959.4/43654.
Full textHouzé, Bérengère. "Plasticité corticale et effet antalgique de la neurostimulation." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00649427.
Full textElia, Simona. "Modelling and performance analysis of a neurostimulation system." Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/189.
Full textThe activity of this thesis is devoted to modelling the electromagnetic behaviour of complex biological structures and in particular of nerve cells and the study of nanotechnology applications to these structures for therapeutic, diagnostic and investigative purposes. The 'design' of artificial nanoscale devices is the chance to accurately understand and manipulate the phenomena that occur inside biological structures. Until a few years ago, the most widely accepted technology was that of MEA (Micro Electrode Arrays), which indeed is characterized by several limitations, such as microelectrodes whose sizes are very larger than individual cells, lack of local control of electrical activity, etc. In recent years, new possibilities have arisen due to the increasing development of nanotechnology. In particular, the Carbon Nanotubes (CNTs) are very compatible as systems capable of interfacing with the Central Nervous System (CNS). This paves the way for neuro-implantable devices for vision, hearing, taste, movement, elimination of seizures, repair and improvement of brain functions. Increasingly, attempts are being made to try to integrate CNTs with other technologies to develop biochips that can help repairing damaged tissues of the CNS. MEA with electrodes coated with CNTs have recently been proposed. Further progress is being made in the direction of the nanoarray electrode (the so-called NEA - Nano Electrode Array), to have greater spatial and temporal resolution. It is within this very broad and extremely complex scenario that this thesis is placed, investigating Finite Element Method (FEM) modelling and design issues of a neurostimulation system at nanoscale. The apparatus is an array consisting of vertically-aligned CNTs acting as nanoelectrodes to provide a signal electrical stimulation. In particular, the application considered is the neurostimulation of the retina, where the spatial resolution is a crucial factor and a sensitivity analysis proves to be very useful in studying system performances dependences on different main setup parameters. The electromagnetic modelling of the system is performed in a FEM multiphysics environment used to couple in an efficient way the non linear differential equations related to biological system with Maxwell equations. One of the peculiar characteristics of this study is the approach proposed to obtain the dynamics of Action Potential (AP), the basic unit of the nervous message, inside a neuron membrane without the use of the "transmission line" equation, widely adopted in literature. Starting from the Hodgkin and Huxley (HH) model (the nonlinear partial differential equations describing the chemical transport through the nerve membrane) a translation in terms of suitable equivalent electric parameters is obtained for different pieces of the neuron and in a model describing soma, axon hillock and initial axon segment. The HH equations are coupled with those of Maxwell (in quasi-static formulation, due to the considered range of frequencies) and, exploiting the high nonlinearity of the membrane domain, the triggering and propagation of the AP is simulated. A comparison between two proposed modelling approaches is carried out investigating the trade-off between accuracy and numerical burden. Moreover, a systematic determination of the most significant parameters and design variables is also carried out (e.g. AP triggering and its promptness as well as AP duration), allowing to maximize the effectiveness of the artificial stimulation of the biological cell. The optimization of system parameters ( in terms of stimulus and electrode geometrical features) in order to maximize the selective initiation of APs on one neuron or on clusters of several neurons can be effectively accomplished to boost the spatial resolution of the device. Finally, conclusions are drawn and possible future developments are discussed both in terms of model implementation and further studies of the neuroelectrical stimulation and analysis.[edited by author]
IX n.s.
Donas, Konstantinos. "Die Epidurale Neurostimulation in der Behandlung des Buerger-Syndroms." Köln Deutsche Zentralbibliothek für Medizin, 2009. http://d-nb.info/999273019/34.
Full textMalalasekera, W. M. Anoma. "Computational analysis of bioelectric fields in relation to neurostimulation." Thesis, Brunel University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334410.
Full textLesage, Elise. "On the cerebellum and language : neurostimulation and imaging studies." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4926/.
Full textBibin, Lazar. "Simulation 3-D d'anesthésie loco-régionale : neurostimulation et échographie." Paris 5, 2007. http://www.theses.fr/2007PA05S004.
Full textBergeron-Vézina, Kayla. "Efficacité analgésique de la neurostimulation périphérique (TENS) chez les aînés." Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/6067.
Full textAbou-Nader, Joseph. "La Neurostimulation intériorisée dans le syndrome douleureux : critères et résultats." Montpellier 1, 1988. http://www.theses.fr/1988MON11284.
Full textCaytak, Herschel Binyomin. "Bioimpedance Spectroscopy Methods for Analysis and Control of Neurostimulation Dose." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38629.
Full textRobertson, James. "Accurate simulation of low-intensity transcranial ultrasound propagation for neurostimulation." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1574816/.
Full text[Verfasser]. "Die Epidurale Neurostimulation in der Behandlung des Buerger-Syndroms / Konstantinos Donas." Köln : Deutsche Zentralbibliothek für Medizin, 2009. http://nbn-resolving.de/urn:nbn:de:hbz:38m-0000001570.
Full textDonas, Konstantinos [Verfasser]. "Die Epidurale Neurostimulation in der Behandlung des Buerger-Syndroms / Konstantinos Donas." Köln : Deutsche Zentralbibliothek für Medizin, 2009. http://d-nb.info/999273019/34.
Full textSchafer, Leah I. "The Effects of Transcutaneous Electrical Neurostimulation on Analgesia and Peripheral Perfusion." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1519.
Full textMassé-Alarie, Hugo. "Neurostimulation périphérique et entraînement moteur en lombalgie chronique : influence sur les mécanismes corticaux et le contrôle postural." Master's thesis, Université Laval, 2011. http://hdl.handle.net/20.500.11794/23163.
Full textTecher, Jean Denis. "Conception d'un stimulateur implantable dédié à la stimulation électrique fonctionnelle." Montpellier 2, 2005. http://www.theses.fr/2005MON20169.
Full textVasant, Dipesh. "Translational studies in the development of neurostimulation based interventions for rehabilitation of dysphagia after stroke." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/translational-studies-in-the-development-of-neurostimulation-based-interventions-for-rehabilitation-of-dysphagia-after-stroke(39e3cd47-6824-4a53-8ea8-306b310a693e).html.
Full textBrunner, Daniel. "Conception d'un stimulateur destiné aux patients souffrant d'incontinence urinaire en utilisant la technologie MITEL 1.5 [micromètre]." Sherbrooke : Université de Sherbrooke, 1997.
Find full textBouchard, Luc. "Conception d'un étage de sources de courant et d'une unité externe miniature pour une prothèse urinaire." Sherbrooke : Université de Sherbrooke, 2001.
Find full textMalachowski, Karl. "Mikrotechnische Realisierung und Charakterisierung einer Cuffelektrode mit hoher Ladungsübertragung für die Neurostimulation." Templin Detert, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2766671&prov=M&dok_var=1&dok_ext=htm.
Full textMalachowski, Karl. "Mikrotechnische Realisierung und Charakterisierung einer Cuffelektrode mit hoher Ladungsübertragung für die Neurostimulation /." Templin : Detert, 2006. http://deposit.ddb.de/cgi-bin/dokserv?id=2766671&prov=M&dok_var=1&dok_ext=htm.
Full textJones, Peter D. [Verfasser], and Dieter P. [Akademischer Betreuer] Kern. "Nanofluidic technology for chemical neurostimulation / Peter D. Jones ; Betreuer: Dieter P. Kern." Tübingen : Universitätsbibliothek Tübingen, 2017. http://d-nb.info/116731090X/34.
Full textMichou, Emilia. "Mechanisms and therapeutic application of neurostimulation in the treatment of dysphagia after stroke." Thesis, University of Manchester, 2010. http://www.manchester.ac.uk/escholar/uk-ac-man-scw:136896.
Full textJourdain, Vincent. "Effets de la neurostimulation dans la douleur chronique et la maladie de Parkinson." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27883/27883.pdf.
Full textSaillet, Sandrine. "Effets antiépileptiques de la neurostimulation asservie dans un modèle d'épilepsie chez le rat." Phd thesis, Université de Grenoble, 2010. http://tel.archives-ouvertes.fr/tel-00770861.
Full textCastelli, Jonathan. "Design and validation of innovative integrated circuits and embedded systems for neurostimulation applications." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0812/document.
Full textBioelectronics is a cross-disciplinary field that studies interconnections and interactions between biological entities (cells, tissues, organs) and electronic systems, using the adequate transducer. For excitable cells or tissues (neurons, muscles, . . . ), the transducer takes the form of a simple electrode, as these tissues produce a spontaneous electrical activity or,in the opposite way, may be excited by an external electrical signal. This bi-directional communication gives rise to two experimental schemes: acquisition and stimulation. Acquisition consists in recording, processing and analyzing bio-signals whereas stimulation consists in applying the adequate electrical current to living tissues in order to trigger a reaction. This thesis focuses on the latter: two generations of stimulation systems have been developed, both being centered on an Application Specific Integrated Circuit, and adapted to different application contexts. First, the scientific framework was given by the CENAVEX project, focusing on Functional Electrical Stimulation to rehabilitate the respiratory function, following a Spinal Cord Injury. Then, the design objectives were extended to cover new application needs:in situ electrical impedance monitoring and exploration of original stimulation wave forms.The first one could be a solution to follow the tissue reaction after electrode implantation,hence contributing to long-term biocompatibility of implants; the second one proposes to go further the conventional constant biphasic pulse and explore new wave forms that couldbe most efficient in terms of energy consumption, for a given physiological effect.The work presented in this manuscript is a contribution to the design, fabrication and test of innovative stimulation devices. It leaded to the development of two integrated circuits and two stimulation devices permitting multichannel stimulation. Both electrical characterizations and biological validations, from in vitro feasibility to in vivo experiments, have been conducted and are described in this manuscript
Reichstein, Daniela [Verfasser], Jan [Gutachter] Vesper, and Lars [Gutachter] Wojtecki. "Epidurale Neurostimulation bei chronischer kritischer Extremitätenischämie / Daniela Reichstein ; Gutachter: Jan Vesper, Lars Wojtecki." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2020. http://d-nb.info/1205544194/34.
Full textBracquemart, Nathalie. "La neurostimulation transcutanee dans les douleurs aigues et chroniques ; a propos de 178 cas." Reims, 1992. http://www.theses.fr/1992REIMM106.
Full textKücker, Saskia. "Basalganglien und Epilepsie elektrophysiologische Untersuchungen und experimentell-therapeutische Neurostimulation in Tiermodellen für die Temporallappenepilepsie /." Gießen : DVG-Service, 2009. http://d-nb.info/997312084/34.
Full textCuvillon, Philippe. "Phamacodynamie, pharmacoconetique et innocuité des techniques d'anesthésie loco-régionale tronculaire." Montpellier 1, 2009. http://www.theses.fr/2009MON1T027.
Full textThis study analysed efficacy and safety of perirepheral nerve block used for anesthesia or analgesia after orthopedic surgery. In the first study, we compared the effects of bupivacaine 0. 5% or ropivacaine 0. 75% and lidocaine 2% for surgery after femoral-sciatic peripheral nerve block. The primary end point was onset time. In a double-blind, randomized study, 82 adults scheduled for lower limb surgery received a sciatic (20mL) and femoral (20mL) peripheral nerve block with 0. 5% bupivacaine (200mg), a mixture of 0. 5% bupivacaine 20 mL (100mg) with 2% lidocaine (400mg), 0. 75% ropivacaine (300mg) or a mixture of 0. 75% ropivacaine 20 mL (150mg) with 2% lidocaine (400mg). Each solution contained epinephrine 1 : 200. 000. Sciatic onset times (sensory and motor block) were reduced by combining lidocaine with the long-acting local anesthetic. The onset of bupivacaine-lidocaine was 16+/- 9 min versus 28 +/- min for bupivacaine alone. The onset of ropivacaine-lidociane was 16 +/- 12 min versus 23 +/- 12 for ripovacaine alone. Sensory blocks were complete for all patients within 40 min for those receiving bupivacaine-lidocaine versus 60 min for those receiving bupivacaine alone and 30 min for those receiving bupivacaine alone and 30 min for those receiving ropivacaine-lidocaine versus 40 min for those receiving ropivacaine alone ( P<0. 05). Duration of sensory and motor block was significantly shorter in mixture group. Plasma concentrations of bupivacaine and ropivacaine were higher, and remained elevated longer, in patients who received only the long-acting local anesthetic compared to patients who received the mixture of long-acting local anesthetic with lidocaine (P < 0. 01). Mixtures of long-acting local anesthetics with lidocaine induced faster onset blocks of decreased duration. Whether there is a safety benefit is unclear, as the benefit of a decreased concentration of long-acting local anesthetic may be offset by the presence of a signifiant plasma concentration of lidocaine. The second study was to compare parasacral and Winnie's single -or double- injection approaches for sciatic nerve block. Time to perform the block was 2 (1-5) min for the parasacral method, with no difference from Winnie's single injection (3 [1-10] min), but was shorter with double injection (5. 5 [2-15] min) (P = 0. 0001). Onset of sensory block was similar in the parasacral (25 [7. 5-50] min) and Winnie single-injection groups (25 [5-50] min) but significantly longer in the double-injection group (15 [5-50] min). Time to perform a parasacral block was short, and the parasacral approach had a high success rate and a short onset time. Therefore, this block might be a useful alternative to Winnie's modification for sciatic nerve block. The third study investigated the incidence of bacterial and vascular or neurological complications resulting from femural nerve catheters used for postoperative analgesia. Patients requiring continuous femoral blockade were consecutively included. Using surgical aseptic procedure, 211 femoral nerve catheters were placed (short-beveled insulated needle, peripheral nerve stimulator). After 48h, 208 catheters were analyzed ; 57% had positive bacterial colonization (with a single organism in 53%). In this prospective study, continuous femoral nerve catheters were effective for postoperative analgesia but had a frequent rate of bacterial catheter colonization. We found no serious infections after short-term (2-day) infusion. Side effects were few, but one nerve injury occured. The fourthstudy We conducted this prospective randomized study to compare the success rate and the onset time between 3 intensities of stimulation thr reshold (<0. 5, 0. 5-0. 64, and 0. 65-0. 8 mA) when using a peripheral nerve stimulation at the midhumeral level. Sixty-nine adult patients undergoing elective hand surgery were studied. Blocks were performed using conventional nerve stimulation technique. Needle advance began at 2 mA (1 Hz, 0. 1 millisecond). When motor response (MR) occured at less than 0. 5 mA, needle position was fixed for "group <0. 5 mA. " For "group 0. 5-0. 64 mA. The time required to obtain a complete sensory block was shorter for the 4 nerves in group <0. 5 mA, with a statistical significance for radial and musculocutaneous nerves in group <0. 5 mA versus group 0. 5-0. 64 mA and group >0. 65mA. Patients in group <0. 5 mA had a greater success rate for complete sensory radial nerve compared with those of group 0. 5-0. 64 mA and group >0. 65 mA at any interval times between 5 and 30 mins (P = 0. 0001). We conclude that intensity of stimulation influenced onset time and success rate
Camus, Mickaël. "Contribution de la voie corticospinale aux modulations volontaires des automatismes sensori-moteurs : Etudes par TMS chez l'homme." Aix-Marseille 2, 2004. http://www.theses.fr/2004AIX22033.
Full textThe aim of this thesis was to better understand the involvement of the corticospinal (CS) tract to the voluntarily modulation of the sensori-motor automatism in human. We have studied how, through the modulations of the CS excitability, the cognitive process act during the voluntarily adaptation of human gait. One particularity of these work is to envisage the question both under the motor process side, trying to highlight an CS access to the proximal leg muscles during gait, and under the cognitive process side, studying the contribution of this tract to the cognitive function linked to the motility. This work have been realized thank to the transcranial magnetic stimulation (TMS), a non-invasive tool allowing, in human, to study the CS influence during naturals movements
Nizard, Julien. "Prise en charge interdisciplinaire médico-chirurgicale du patient douloureux chronique réfractaire : place des techniques de neurostimulation invasives et non invasives et de programmes hospitaliers séquentiels." Nantes, 2012. http://archive.bu.univ-nantes.fr/pollux/show.action?id=8a82c2ff-e4bb-4e60-b5f5-7457382d37e3.
Full textTreatment of patients with severe chronic pain is a public health issue, with increasing direct medical costs and significant indirect costs generated by the diseases involved. Multidisciplinary treatment, relying both on evidence-based medicine and on treatment personalisation and stratification adapted to the degree of disability and social and occupational exclusion, is necessary, though as yet insufficiently proposed. Indeed, despite the progressive availability of professional guidelines, their implementation remains heterogeneous and inadequately standardised. This thesis presents a range of studies aimed at improving the management of patients presenting with refractory pain and severe disability. Our work suggests that non-invasive cortical neurostimulation techniques (transcranial magnetic stimulation), or even invasive techniques, may be relevant to concerted multidisciplinary medical-surgical care, enabling better selection of potentially responsive patients. New indications, such as pelvic and perineal pain, having sometimes a major impact on patients' quality of life, may benefit from such techniques. The implementation of treatment programmes, combining complementary care, such as a Multidisciplinary Pain Centre and a Rehabilitation Centre, could improve the return to work and quality of life of these patients, still legitimately awaiting care despite the failure of numerous previous treatments. Such results need to be confirmed by randomised controlled trials conducted at a larger scale
Reader, Arran. "Brain bases of meaningful and meaningless action imitation : a neurostimulation and two-person motion-tracking approach." Thesis, University of Reading, 2018. http://centaur.reading.ac.uk/80262/.
Full textChaffiol, Antoine. "Etude de la représentation des odeurs dans le lobe antennaire de Periplaneta americana." Paris 13, 2007. http://www.theses.fr/2007PA132039.
Full textIn this study, we examined olfaction in the cockroach Periplaneta americana (also known as the American cockroach), and focused on the first olfactory relay, the antennal lobe. The goal of this work was to describe the behavior of antennal lobe neurons either during periods of spontaneous activity or during responses to olfactory stimuli. As information coding involves the activity of populations of neurons, we monitored simultaneously the activity of several cells using Multi Electrode Array (MEA) recordings. Large variations in the discharge patterns were observed during the spontaneous regime, and the combinatorial responses of neurons during odor stimulations displayed complex dynamics. We have also presented preliminary results on the development of a conditioning protocol associated with electrophysiological recordings. Together with these experimental results, we have also developped new tools for quantitative analysis of extracellular recordings that describe and model the spontaneous activity and discharge of neurons during olfactory stimulations. Interactions across neurons can also be investigated. These tools allow the user to analyze the data
Oueslati, Abid. "Implication des systèmes à acides aminés excitateurs dans la maladie de Parkinson et ses traitements." Aix-Marseille 2, 2008. http://theses.univ-amu.fr.lama.univ-amu.fr/2008AIX22015.pdf.
Full textThe abnormal activation of glutamate systems, notably subthalamic nucleus (STN), in response to dopamine denervation in the basal ganglia (BG), plays a major role in the expression of the symptoms of Parkinson’s disease (PD). The surgical treatment by high frequency stimulation (HFS) of STN has emerged as an efficient therapeutic option for PD patients suffering from severe side effects produced by long-term L-DOPA treatment. However, the action mechanisms of this stimulation remain poorly understood and its application presents important limitations. In the research of alternative pharmacological treatment, metabotropic glutamate receptors (mGluRs) have been recently stressed as interesting molecular targets. In this context, the first objective of my PhD work was to characterize the neural bases of the therapeutic action of STN HFS and its interaction with L-DOPA medication in a rat model of late PD. Our results show that prolonged STN HFS for several days is required to significantly alleviate the severe akinetic deficits produced by extensive dopamine lesion. Such prolonged HFS did not alleviate but even exacerbated the L-DOPA-induced dyskinesias (LID). We further identified striatum as a main site for the interactions between the two treatments. Indeed, when applied together or after chronic dyskinesiogenic L-DOPA treatment, the surgical treatment potentiated the L-DOPA-mediated cellular responses, including those linked to LID. These data argue against a direct anti-dyskinetic action of STN-HFS and suggest that this surgical treatment acts primarily at striatal level through L-DOPA signalling pathway. The second objective was to identify the cellular substrates of the antiparkinsonian benefits provided by the pharmacological blockade of mGluR5 using the antagonist MPEP in a rat model of early symptomatic stages of PD based on restricted denervation of the motor striatal territory. In this model, the expression of akinetic deficits was associated with focused metabolic changes in the corticobasal ganglia-cortical loop: neuronal metabolic activity was increased in the STN and SNr and decreased in the frontal cortex. The anti-akinetic action of MPEP was correlated with the reversal of these lesion-induced cellular changes. These data point to the major role of a subthalamo-nigro-cortical sub-circuit in the expression of akinesia in early PD stages, and to mGluR5 negative modulation as a promising antiparkinsonian strategy. Overall, this work contributes in advancing our knowledge of the neural and cellular bases of PD symptoms and of the action of different treatments targeting glutamate systems on motor control, with potential insights onto the symptomatic treatment of PD
Bordeleau, Martine. "Effets de la stimulation spinale médullaire sur le profil sensoriel de patients atteints de douleur chronique." Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/67726.
Full textNuti, Christophe. "Enregistrements multimodulaires de la douleur et de la somesthésie chez l'homme : données de l'electrophysiologie et de l'imagerie. : application à la stimulation chronique du cortex moteur." Saint-Etienne, 2006. http://www.theses.fr/2006STET006T.
Full textCherouali, Toufik. "Caractérisation et implantation de la stimulation mécanique de la boucle neuromusculaire gamma sur une machine isocinétique." Reims, 2004. http://theses.univ-reims.fr/exl-doc/GED00000049.pdf.
Full textThis work describes the characterization, implementation, and evaluation of mechanical stimulation with a view to enhancing muscular force by exploiting the effect of the neuromuscular gamma loop (NGL). After a study of the characteristics of muscle, a functional regulation diagram is proposed. Then, the specification and characterization of stimulation patterns allowed to identify the parameters required for the implementation on an isokinetic machine. After an adaptation of the control system of the machine, we have proposed a generic force based control scheme for Isokinetic machines. This controller carries out small movements used to stretch muscle, and this repeated stretching invokes the NGL during exercise. Some experimental results illustrate the efficiency of the proposed controllers and provide interesting results that can be easily exploited by the domain specialists to develop suitable training protocols using mechanical stimulation
Gibson, Jessica. "The Influence of Sex and Physical Activity Level on the Modulation of Pain Perception in Response to Transcutaneous Spinal Direct Current Stimulation." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/38487.
Full textRapaport, Stéphane. "Etude comparative de l'association de ropivacai͏̈ne 0,2% ou de bupivacai͏̈ne 0,25% à la mépivacai͏̈ne 2% versus mépivacai͏̈ne 1% seule au cours du bloc axillaire par multineurostimulation dans le cadre de l'anesthésie ambulatoire." Bordeaux 2, 1999. http://www.theses.fr/1999BOR23061.
Full text