Ce travail a été soutenu par le NIH subvention P20 GM109098, NSF et WVU Programme de commandites ADVANCE (VG), et les fonds de démarrage départementales WVU.

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The authors have no conflicts of interest to declare.

L&#39;objectif de cet article est de décrire un procédé d&#39;incorporation VR dans l&#39;étude du mouvement humain et un procédé de synchronisation différents flux de données. Réalité virtuelle va étendre les capacités de chercheurs qui tentent de recréer des scénarios de mouvement du monde réel dans un environnement de laboratoire. Combinant VR avec d&#39;autres méthodes d&#39;enregistrement et de stimulation neuromusculaire forme une puissante suite d&#39;outils pour étudier en détail les mécanisme...

La réalité virtuelle (VR) est rapidement devenu un outil de recherche accessible pour une utilisation dans un certain nombre de domaines, y compris l&#39;étude du mouvement humain. L&#39;étude du mouvement du membre supérieur est particulièrement bénéficié en incorporant VR. La réalité virtuelle permet la personnalisation rapide des paramètres expérimentaux conçus pour étudier les caractéristiques spécifiques cinématiques et dynamiques de contrôle de mouvement du bras. Ces paramètres peuvent être ajustés individuellement pour chaque sujet. Par exemple, les emplacements des cibles virtuelles peuvent être redimensionnées pour assurer identiques posture initial des bras dans toutes les disciplines. La réalité virtuelle permet également la manipulation de rétroaction visuelle au cours d&#39;expériences, qui est un outil précieux dans la recherche visuomoteur 1-5. L&#39;utilisation des environnements réalistes VR avec d&#39;autres outils biomécaniques permettra également scénarios de mouvement naturel dans lequel de tester les habitudes de déplacement. Cet arrangement est de plus en plus précieux pour leétude et la pratique de la réadaptation après maladies et des blessures 6,7. Mimant les mouvements et les environnements naturalistes (par exemple la réalisation des mouvements dans une cuisine virtuelle) dans un contexte clinique permettront spécialistes de la réadaptation pour décrire plus précisément les déficiences d&#39;un individu dans un contexte réel. Descriptions de valeur fortement individualisée permettront de stratégies de traitement plus ciblés, augmentant potentiellement l&#39;efficacité et en réduisant la durée de la réadaptation. Combinant VR avec d&#39;autres outils tels que la stimulation magnétique transcrânienne (TMS), électromyographie de surface (EMG), et plein de capture de mouvement du corps, crée une plate-forme extrêmement puissante et flexible pour l&#39;étude du contrôle neuromusculaire du mouvement chez l&#39;homme. La stimulation magnétique transcrânienne est une méthode non-invasive puissante de mesurer l&#39;excitabilité et l&#39;intégrité fonctionnelle des voies descendantes à moteur (par exemple faisceau cortico-spinal) à travers responsab EMGes tels que potentiels évoqués moteurs (MPE) 8. Systèmes de capture de mouvement moderne en trois dimensions permettent également aux chercheurs d&#39;étudier l&#39;activité neuromusculaire avec résultant cinématique du mouvement et de la dynamique. Cela permet la création de modèles extrêmement détaillés de l&#39;appareil locomoteur ainsi que de tester des hypothèses concernant la structure et la fonction des contrôleurs neuronaux. Ces études permettront d&#39;élargir notre connaissance scientifique du système sensori-moteur humain et conduire à des améliorations dans le traitement de l&#39;appareil locomoteur et des troubles neurologiques. Cependant, un problème majeur avec les systèmes multifonctionnels est la synchronisation des flux de données enregistrées séparément (par exemple de capture de mouvement, EMG, etc.). L&#39;objectif de ce protocole est de décrire un arrangement généralisable des systèmes disponibles dans le commerce communes d&#39;enregistrer simultanément des mesures biomécaniques et physiologiques pendant le mouvement. D&#39;autres chercheurs utilisant des équipements dedifférents fabricants peuvent avoir à modifier des éléments de ce protocole pour répondre à leurs besoins spécifiques. Cependant, les principes généraux de ce protocole doivent encore être applicable.

<table border="0" cellpadding="0" cellspacing="0">
	<tbody>
		<tr>
			<td>Transcranial magnetic stimulator</td>
			<td>Magstim</td>
			<td>N/A</td>
			<td>TMS stimulator and coils</td>
		</tr>
		<tr>
			<td>Impulse X2</td>
			<td>PhaseSpace</td>
			<td>N/A</td>
			<td>Motion capture system</td>
		</tr>
		<tr>
			<td>MA300 Advanced Multi-Channel EMG System</td>
			<td>Motion Lab Systems</td>
			<td>MA300-28</td>
			<td>EMG pre-amplifier and amplifier</td>
		</tr>
		<tr>
			<td>Norotrode EMG electrodes</td>
			<td>Myotronics</td>
			<td>N/A</td>
			<td>EMG electrodes</td>
		</tr>
		<tr>
			<td>BNC-2111 Single-Ended, Shielded BNC Connector Block</td>
			<td>National Instruments</td>
			<td>779347-01</td>
			<td>BNC Connector Block</td>
		</tr>
		<tr>
			<td>NI PXI-1033 
			5-Slot PXI Chassis with Integrated MXI-Express Controller</td>
			<td>National Instruments</td>
			<td>779757-01</td>
			<td>DAQ chassis</td>
		</tr>
		<tr>
			<td>NI PXI-6254 
			16-Bit, 1 MS/s (Multichannel), 1.25 MS/s (1-Channel), 32 Analog Inputs</td>
			<td>National Instruments</td>
			<td>779118-01</td>
			<td>DAQ card</td>
		</tr>
		<tr>
			<td>SHC68-68-EPM Cable (2m)</td>
			<td>National Instruments</td>
			<td>192061-02</td>
			<td>Shielded cable</td>
		</tr>
		<tr>
			<td>DK1 or DK2</td>
			<td>Oculus VR</td>
			<td>N/A</td>
			<td>Ocuclus Rift headset</td>
		</tr>
		<tr>
			<td>Vizard 5 Lite</td>
			<td>WorldViz</td>
			<td>N/A</td>
			<td>Virtual reality software</td>
		</tr>
		<tr>
			<td>C1 and C2 capacitors</td>
			<td>varied</td>
			<td>N/A</td>
			<td>Adjust values to suit</td>
		</tr>
		<tr>
			<td>R1 and R2 resistors</td>
			<td>varied</td>
			<td>N/A</td>
			<td>Adjust values to suit</td>
		</tr>
		<tr>
			<td>CD4011 NAND gate</td>
			<td>varied</td>
			<td>N/A</td>
			<td>NAND gate</td>
		</tr>
		<tr>
			<td>2N2222 transistor</td>
			<td>varied</td>
			<td>N/A</td>
			<td>Transistor</td>
		</tr>
		<tr>
			<td>NE555 timer circuit</td>
			<td>varied</td>
			<td>N/A</td>
			<td>Timer circuit</td>
		</tr>
		<tr>
			<td>DB25 and USB connectors</td>
			<td>varied</td>
			<td>N/A</td>
			<td>parallel and USB connectors</td>
		</tr>
	</tbody>
</table>

multifunctional setup for studying human motor control using transcranial magnetic stimulation, electromyography, motion capture, and virtual reality

L&#39;étude de contrôle neuromusculaire du mouvement chez l&#39;homme est accompli avec de nombreuses technologies. Les méthodes non invasives pour enquêter sur la fonction neuromusculaire incluent la stimulation magnétique transcrânienne, électromyographie, et la capture de mouvement en trois dimensions. L&#39;avènement des solutions de réalité virtuelle facilement disponibles et rentables a élargi les capacités des chercheurs à recréer des environnements et des mouvements &quot;monde réel&quot; dans un environnement de laboratoire. Analyse du mouvement naturaliste ne sera pas seulement recueillir une plus grande compréhension du contrôle moteur chez les individus sains, mais aussi permettre la conception des expériences et des stratégies de réadaptation qui ciblent des déficiences motrices spécifiques (par exemple, accident vasculaire cérébral). L&#39;utilisation combinée de ces outils va conduire à la compréhension plus profonde des mécanismes neuronaux de contrôle moteur. Une exigence clé lorsque l&#39;on combine ces systèmes d&#39;acquisition de données est la correspondance temporelle fine entre les différents flux de données. Tson protocole décrit globale connectivité d&#39;un système multifonctionnel, signalisation inter-, et la synchronisation temporelle des données enregistrées. Synchronisation des systèmes de composants est principalement réalisé par l&#39;utilisation d&#39;un circuit personnalisable, facilement fait avec les composants hors du plateau et électronique minimale compétences d&#39;assemblage.

Synchronisation des nombreux flux de données dans cette configuration permet d&#39;enregistrer la cinématique, l&#39;activité musculaire continue (EMG), et instantanées activité neuromusculaire (MPE) qui se produisent lors des mouvements du membre supérieur. Essais répétés d&#39;un mouvement donné sont nécessaires pour reconstruire des profils de réponse MEP sur un mouvement complet. La figure 4 présente les données recueillies à partir d&#39;un sujet. La figure 4A montre...

Watch this Scientific Journal Video about Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality at JoVE.

Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Transcranial magnetic stimulation, electromyography, and 3D motion capture are commonly used non-invasive techniques for investigating neuromuscular function in humans. In this paper, we describe a protocol that synchronously samples data generated by all three of these tools along with the unique addition of virtual reality stimulus presentation and feedback.

Configuration multifonctions pour l&#39;étude de contrôle du moteur humain utilisant la stimulation magnétique transcrânienne, électromyographie, Motion Capture, et Réalité Virtuelle

The study of neuromuscular control of movement in humans is accomplished with numerous technologies. Non-invasive methods for investigating neuromuscular ...

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10.8K vues.  West Virginia University. Transcranial magnetic stimulation, electromyography, and 3D motion capture are commonly used non-invasive techniques for investigating neuromuscular function in humans. In this paper, we describe a protocol that synchronously samples data generated by all three of these tools along with the unique addition of virtual reality stimulus presentation and feedback.

Vidéo: Multifunctional Setup for Studying Human Motor Control Using Transcranial Magnetic Stimulation, Electromyography, Motion Capture, and Virtual Reality

Stimulating the Lip Motor Cortex with Transcranial Magnetic Stimulation

Transcranial magnetic stimulation (TMS) has proven to be a useful tool in investigating the role of the articulatory motor cortex in speech perception. Researchers have used single-pulse and repetitive TMS to stimulate the lip representation in the motor cortex. The excitability of the lip motor representation can be investigated by applying single TMS pulses over this cortical area and recording TMS-induced motor evoked potentials (MEPs) via electrodes attached to the lip muscles (electromyography; EMG). Larger MEPs reflect increased cortical excitability. Studies have shown that excitability increases during listening to speech as well as during&#160;viewing speech-related movements. TMS can be used also to disrupt the lip motor representation. A 15-min train of low-frequency sub-threshold repetitive stimulation has been shown to suppress motor excitability for a further 15-20 min. This TMS-induced disruption of the motor lip representation impairs subsequent performance in demanding speech perception tasks and modulates auditory-cortex responses to speech sounds. These findings are consistent with the suggestion that the motor cortex contributes to speech perception. This article describes how to localize the lip representation in the motor cortex and how to define the appropriate stimulation intensity for carrying out both single-pulse and repetitive TMS experiments.

Transcranial magnetic stimulation (TMS) has proven to be a useful tool in investigating the role of the articulatory motor cortex in speech perception.&#160; This article describes how to record motor evoked potentials (MEPs) from the lip muscles and how to disrupt the motor lip representation using repetitive TMS.

Stimuler la lèvre Cortex moteur avec la stimulation magnétique transcrânienne

Transcranial magnetic stimulation (TMS) has proven to be a useful tool in investigating the role of the articulatory motor cortex in speech perception. ...

Recherche

Sciences du comportement

Transcranial Direct Current Stimulation and Simultaneous  Functional Magnetic Resonance Imaging

Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation technique that uses weak electrical currents administered to the scalp to manipulate cortical excitability and, consequently, behavior and brain function. In the last decade, numerous studies have addressed short-term and long-term effects of tDCS on different measures of behavioral performance during motor and cognitive tasks, both in healthy individuals and in a number of different patient populations. So far, however, little is known about the neural underpinnings of tDCS-action in humans with regard to large-scale brain networks. This issue can be addressed by combining tDCS with functional brain imaging techniques like functional magnetic resonance imaging (fMRI) or electroencephalography (EEG).
In particular, fMRI is the most widely used brain imaging technique to investigate the neural mechanisms underlying cognition and motor functions. Application of tDCS during fMRI allows analysis of the neural mechanisms underlying behavioral tDCS effects with high spatial resolution across the entire brain. Recent studies using this technique identified stimulation induced changes in task-related functional brain activity at the stimulation site&#160;and also in more distant brain regions, which were associated with behavioral improvement. In addition, tDCS administered during resting-state fMRI allowed identification of widespread changes in whole brain functional connectivity.
Future studies using this combined protocol should yield new insights into the mechanisms of tDCS action in health and disease and new options for more targeted application of tDCS in research and clinical settings. The present manuscript describes this novel technique in a step-by-step fashion, with a focus on technical aspects of tDCS administered during fMRI.

Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation technique. It has successfully been used in basic research and clinical settings to modulate brain function in humans. This article describes the implementation of tDCS and simultaneous functional magnetic resonance imaging (fMRI), to investigate the neural basis of tDCS effects.

Transcrânienne à courant de stimulation et simultanée fonctionnelle imagerie par résonance magnétique

Transcranial direct current stimulation (tDCS) is a noninvasive brain stimulation technique that uses weak electrical currents administered to the scalp ...

Transcranial Magnetic Stimulation for Investigating Causal Brain-behavioral Relationships and their Time Course

Transcranial magnetic stimulation (TMS) is a safe, non-invasive brain stimulation technique that uses a strong electromagnet in order to temporarily disrupt information processing in a brain region, generating a short-lived &#8220;virtual lesion.&#8221; Stimulation that interferes with task performance indicates that the affected brain region is necessary to perform the task normally. In other words, unlike neuroimaging methods such as functional magnetic resonance imaging (fMRI) that indicate correlations between brain and behavior, TMS can be used to demonstrate causal brain-behavior relations. Furthermore, by varying the duration and onset of the virtual lesion, TMS can also reveal the time course of normal processing. As a result, TMS has become an important tool in cognitive neuroscience. Advantages of the technique over lesion-deficit studies include better spatial-temporal precision of the disruption effect, the ability to use participants as their own control subjects, and the accessibility of participants. Limitations include concurrent auditory and somatosensory stimulation that may influence task performance, limited access to structures more than a few centimeters from the surface of the scalp, and the relatively large space of free parameters that need to be optimized in order for the experiment to work. Experimental designs that give careful consideration to appropriate control conditions help to address these concerns. This article illustrates these issues with TMS results that investigate the spatial and temporal contributions of the left supramarginal gyrus (SMG) to reading.

Transcranial magnetic stimulation (TMS) is a technique for non-invasively disrupting neural information processing and measuring its effect on behavior. When TMS interferes with a task, it indicates that the stimulated brain region is necessary for normal task performance, allowing one to systematically relate brain regions to cognitive functions.

Stimulation magnétique transcrânienne pour l&#39;étude des relations causales Brain-comportementales et leur temps de parcours

Transcranial magnetic stimulation (TMS) is a safe, non-invasive brain stimulation technique that uses a strong electromagnet in order to temporarily ...

Neuronavigation-guided Repetitive Transcranial Magnetic Stimulation for Aphasia

Repetitive transcranial magnetic stimulation (rTMS) is widely used for several neurological conditions, as it has gained acknowledgement for its potential therapeutic effects. Brain excitability is non-invasively modulated by rTMS, and rTMS to the language areas has proved its potential effects on treatment of aphasia. In our protocol, we aim to artificially induce virtual aphasia in healthy subjects by inhibiting Brodmann area 44 and 45 using neuronavigational TMS (nTMS), and F3 of the International 10-20 EEG system for conventional TMS (cTMS). To measure the degree of aphasia, changes in reaction time to a picture naming task pre- and post-stimulation are measured and compare the delay in reaction time between nTMS and cTMS. Accuracy of the two TMS stimulation methods is compared by averaging the Talairach coordinates of the target and the actual stimulation. Consistency of stimulation is demonstrated by the error range from the target. The purpose of this study is to demonstrate use of nTMS and to describe the benefits and limitations of the nTMS compared to those of cTMS.

This study is designed to test the hypothesis that neuronavigational system-guided transcranial magnetic stimulation has higher accuracy for targeting the intended target as demonstrated by eliciting a greater degree of virtual aphasia in healthy subjects, measured by delay in reaction time to picture naming.

Neuronavigation guidée Répétitive stimulation magnétique transcrânienne pour Aphasia

Repetitive transcranial magnetic stimulation (rTMS) is widely used for several neurological conditions, as it has gained acknowledgement for its potential ...

Treating Clinical Depression with Repetitive Deep Transcranial Magnetic Stimulation Using the Brainsway H1-coil

Repetitive transcranial magnetic stimulation (rTMS) is an emerging non-pharmacological approach to treating many brain-based disorders. rTMS uses electromagnetic coils to stimulate areas of the brain non-invasively. Deep transcranial magnetic stimulation (dTMS) with the Brainsway H1-coil system specifically is a type of rTMS indicated for treating patients with major depressive disorder (MDD) who are resistant to medication. The unique H1-coil design of this device is able to stimulate neuronal pathways that lie deeper in the targeted brain areas than those reached by conventional rTMS coils. dTMS is considered to be low-risk and well tolerated, making it a viable treatment option for people who have not responded to medication or psychotherapy trials for their depression.
Randomized, sham-control studies have demonstrated that dTMS produces significantly greater improvement in depressive symptoms than sham dTMS treatment in patients with major depression that has not responded to antidepressant medication. In this paper, we will review the methodology for treating major depression with dTMS using an H1-coil.

Here we present a protocol outlining the methodology for treatment of Major Depressive Disorder using the deep Transcranial Magnetic Stimulation (dTMS) system.

Traitement de la dépression clinique avec Répétitive profonde stimulation magnétique transcrânienne Utilisation du Brainsway H1-bobine

Repetitive transcranial magnetic stimulation (rTMS) is an emerging non-pharmacological approach to treating many brain-based disorders. rTMS uses ...

Substantiating Appropriate Motion Capture Techniques for the Assessment of Nordic Walking Gait and Posture in Older Adults

Nordic walking (NW) has become a safe and simple form of exercise in recent years, and in studying this gait pattern, various data collection techniques have been employed, each with positives and negatives. The aim was to determine the effect of NW on older adult gait and posture and to determine optimal use of different data collection systems in both short and long duration analysis. Gait and posture during NW and normal walking were assessed in 17 healthy older adults (age: 69 &#177; 7.3). Participants performed two trials of 6 Minute Walk Tests (6MWT) (1 with poles (WP) and 1 without poles (NP)) and 6 trials of a 5m walk (3 WP and 3 NP). Motion was recorded using two systems, a 6-sensor accelerometry system and an 8-camera 3-dimensional motion capture system, in order to quantify spatial-temporal, kinematic, and kinetic parameters.
With both systems, participants demonstrated increased stride length and double support and decreased gait speed and cadence WP compared to NP (p &#60;0.05). Also, with motion capture, larger single support time was found WP (p &#60;0.05). With 3-D capture, smaller hip power generation and moments of force were found at heel contact and pre-swing as well as smaller knee power absorption at heel contact, pre-swing, and terminal swing WP compared to NP, when assessed over one cycle (p &#60;0.05). Also, WP yielded smaller moments of force at heel contact and terminal swing along with larger moments at mid-stance of a gait cycle (p &#60;0.05). No changes were found for posture.
NW seems appropriate for promoting a normal gait pattern in older adults. Three-dimensional motion capture should primarily be used during short duration gait analysis (i.e. single gait cycle), while accelerometry systems should be primarily employed in instances requiring longer duration analysis such as during the 6MWT.

The aim was to substantiate optimal use of data collection techniques for Nordic walking gait and posture analysis. Three-dimensional motion capture should be used during short duration analysis (i.e. single gait cycle), while accelerometry should be employed for longer duration analysis (i.e. repeated cycles) like a 6 Minute Walk Test.

Justifiant appropriées Techniques de capture de mouvement pour l&#39;évaluation de Nordic Walking Gait et Posture chez les personnes âgées

Nordic walking (NW) has become a safe and simple form of exercise in recent years, and in studying this gait pattern, various data collection techniques ...

Repetitive Transcranial Magnetic Stimulation to the Unilateral Hemisphere of Rat Brain

Previous rodent models of repetitive transcranial magnetic stimulation (rTMS) adopted whole-brain stimulation instead of unilateral hemispheric rTMS, which is unlike the protocols used for human subjects. We report a successful application of rTMS to the unilateral hemisphere of rat brain. The rTMS was delivered with a low-frequency (1 Hz), high-frequency (20 Hz), or sham stimulation protocol to one side of the brain by using a small 25-mm figure-8 coil. We placed the center of the coil 1 cm lateral to the vertex on the biauricular line and angulated the coil 45&#176; to the ground to minimize a potential direct effect of rTMS on the contralateral cortex. We also used an in-house water cooling system to enable repetitive magnetic stimulation for more than 20 min, even at a 20-Hz stimulation frequency. Increases in the transcriptions of immediate early genes (Arc, Junb, and Egr2) were greater after rTMS than after sham stimulation. After 5 consecutive days of 20-min 1-Hz rTMS, bdnf mRNA expression was significantly higher in stimulated cortex than in contralateral side. The model presented herein will elucidate the molecular mechanisms of rTMS by allowing analysis of the inter-hemispheric difference in its effect.

We applied repetitive transcranial magnetic stimulation (rTMS) to the unilateral hemisphere of rat brain, by placing a 25-mm figure-8 coil 1 cm lateral to the vertex on the biauricular line and angulating the coil by 45&#176;. An in-house water cooling system was used for rTMS for more than 20 min.

Répétitif stimulation magnétique transcrânienne à l&#39;Unilatérale hémisphère de cerveau de rat

Previous rodent models of repetitive transcranial magnetic stimulation (rTMS) adopted whole-brain stimulation instead of unilateral hemispheric rTMS, ...

Simultaneous Transcranial Alternating Current Stimulation and Functional Magnetic Resonance Imaging

Transcranial alternating current stimulation (tACS) is a promising tool for noninvasive investigation of brain oscillations. TACS employs frequency-specific stimulation of the human brain through current applied to the scalp with surface electrodes. Most current knowledge of the technique is based on behavioral studies; thus, combining the method with brain imaging holds potential to better understand the mechanisms of tACS. Because of electrical and susceptibility artifacts, combining tACS with brain imaging can be challenging, however, one brain imaging technique that is well suited to be applied simultaneously with tACS is functional magnetic resonance imaging (fMRI). In our lab, we have successfully combined tACS with simultaneous fMRI measurements to show that tACS effects are state, current, and frequency dependent, and that modulation of brain activity is not limited to the area directly below the electrodes. This article describes a safe and reliable setup for applying tACS simultaneously with visual task fMRI studies, which can lend to understanding oscillatory brain function as well as the effects of tACS on the brain.

Transcranial alternating current stimulation (tACS) is a promising tool for noninvasive investigation of brain oscillations, though its effects are not completely understood. This article describes a safe and reliable setup for applying tACS simultaneously with functional magnetic resonance imaging, which can increase understanding oscillatory brain function and effects of tACS.

Stimulation du courant alternatif transcrânien simultané et imagerie par résonance magnétique fonctionnelle

Transcranial alternating current stimulation (tACS) is a promising tool for noninvasive investigation of brain oscillations. TACS employs ...

Using Virtual Reality to Transfer Motor Skill Knowledge from One Hand to Another

As far as acquiring motor skills is concerned, training by voluntary physical movement is superior to all other forms of training (e.g. training by observation or passive movement of trainee&#39;s hands by a robotic device). This obviously presents a major challenge in the rehabilitation of a paretic limb since voluntary control of physical movement is limited. Here, we describe a novel training scheme we have developed that has the potential to circumvent this major challenge. We exploited the voluntary control of one hand and provided real-time movement-based manipulated sensory feedback as if the other hand is moving. Visual manipulation through virtual reality (VR) was combined with a device that yokes left-hand fingers to passively follow right-hand voluntary finger movements. In healthy subjects, we demonstrate enhanced within-session performance gains of a limb in the absence of voluntary physical training. Results in healthy subjects suggest that training with the unique VR setup might also be beneficial for patients with upper limb hemiparesis by exploiting the voluntary control of their healthy hand to improve rehabilitation of their affected hand.

We describe a novel virtual-reality based setup which exploits voluntary control of one hand to improve motor-skill performance in the other (non-trained) hand. This is achieved by providing real-time movement-based sensory feedback as if the non-trained hand is moving. This new approach may be used to enhance rehabilitation of patients with unilateral hemiparesis.

Utilisant la réalité virtuelle à transférer les connaissances de la motricité d’une main à l’autre

As far as acquiring motor skills is concerned, training by voluntary physical movement is superior to all other forms of training (e.g. training by ...

Measuring the Kinematics of Daily Living Movements with Motion Capture Systems in Virtual Reality

The inability to complete instrumental activities of daily living (IADL) is a precursor to various neuropsychological diseases. Questionnaire-based assessments of IADL are easy to use but prone to subjective bias. Here, we describe a novel virtual reality (VR) test to assess two complex IADL tasks: handling financial transactions and using public transportation. While a participant performs the tasks in a VR setting, a motion capture system traces the position and orientation of the dominant hand and head in a three-dimensional Cartesian coordinate system. Kinematic raw data are collected and converted into &#39;kinematic performance measures,&#39; i.e., motion trajectory, moving distance, and time to completion. Motion trajectory is the path of a particular body part (e.g., dominant hand or head) in space. Moving distance refers to the total distance of the trajectory, and time to completion is how long it took to complete an IADL task. These kinematic measures could discriminate patients with cognitive impairment from healthy controls. The development of this kinematic measuring protocol allows detection of early IADL-related cognitive impairments.

We designed a virtual reality test to assess instrumental activities of daily living (IADL) with a motion capture system. We propose a detailed kinematic analysis to interpret the participant&#39;s various movements, including trajectory, moving distance, and time to completion to evaluate IADL capabilities.

Mesurer la cinématique des mouvements de la vie quotidienne avec les systèmes de Capture de mouvement en réalité virtuelle

The inability to complete instrumental activities of daily living (IADL) is a precursor to various neuropsychological diseases. Questionnaire-based ...