Stimulation Galvanique Vestibulaire

Study Overview
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Brief Summary
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Right posterior parietal cortex is involved in spatial cognition. Blindfolded patients suffering right posterior parietal lesions fail to update their own position after a body rotation. Right cathodal galvanic vestibular stimulation activates right posterior parietal cortex and reduces symptoms of spatial neglect, another disability frequently encountered after right posterior parietal lesion. The aims of this study are to confirm posterior parietal involvement in automatic updating of body-centered spatial relationships and to evaluate therapeutic effects of galvanic vestibular stimulation. Performances of three groups of adults are compared before and during galvanic vestibular stimulation on a pointing task: a healthy control group, a brain-injured control group with stroke lesions sparing right posterior parietal cortex and a group of stroke patients with right posterior parietal lesions.

Official Title
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Galvanic Vestibular Stimulation : Role in the Improvement of Egocentric Frame in Patient With Right Parietal Lobe Lesions

Conditions
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Hypertensive Hemorrhage of Right Parietal Lobe

Intervention / Treatment
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* Device: galvanic vestibular stimulation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: patient with right posterieur parietal lobe lesion patient with cerebral vascular stroke healthy volonteers Age greater than or equal to 18 written informed consent Exclusion Criteria: patient's refusal to participate to the study inability to cooperate cognitive trouble epilepsy

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: patient with right parietal lobe lesion<br>Patient with right parietal lobe lesion | Device: galvanic vestibular stimulation<br> <br> * Other names: deviation from target score with and without galvanic vestibular stimulation;|
| Experimental: patient stroke<br>patient with cerebral vascular accident | Device: galvanic vestibular stimulation<br> <br> * Other names: deviation from target score with and without galvanic vestibular stimulation;|
| Experimental: healthy volunteers<br>healthy volunteers | Device: galvanic vestibular stimulation<br> <br> * Other names: deviation from target score with and without galvanic vestibular stimulation;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| deviation from target score | difference in degree between the actual and target score | 30 min | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| deviation from target straight ahead | difference in degree between the actual straight ahead and target score | 30min | 
| deviation rightward line bisection | percentage difference between actual and target score on test deviation right line bisection | 30min | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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galvanic vestibular stimulation, right parietal lobe lesion, egocentric space