Effects of tDCS on Quadriceps Strength After Stroke

a Controlled, Randomized Study Evaluating the Immediate Effect of One tDCS Session on Quadriceps Strength in Hemiparetic Patients.

Previous studies show that one session of tDCS allow to improve muscle strength in hemiparetic patients in anodal condition. We test a new electrods configuration : a anodale stimulation opposite to the cortical representation area of the injured hemisphere and a simultaneous stimulation opposite to the homonyme the cortical representation area of the healthy hemisphere. This approach seems to be the best relevant electrods configuration in order to restore the inter-hemispheric balance.

We hypothesis that one session of tDCS with this electrods configuration allow to improve paretic quadriceps strength in hemiparetic patients after stroke.

Inclusion Criteria:

• written consent
• hemiparetic patient after stroke in chronic phase (> 6 months)
• capacity to walk with or without technical assistance
• following rehabilitation program for lower limbs

Exclusion Criteria:

• patient with bilateral brain lesion, cerebellar syndrom, and apraxia and/or aphasia
• previous orthopedic surgery in paretic lower limb (<6 moths)
• usual tDCS contraindications
• pregnant woman