The purpose of this study is to evaluate changes in strategies of hemiparetic upper limb movement in chronic stroke patients following rehabilitation using the "Nintendo Wii". The investigators hypothesize that patients will increase their use of compensatory strategies following this rehabilitation.

The principal aim of this study is to evaluate changes in strategies of hemiparetic upper limb movement in chronic stroke patients following twelve one hour sessions of rehabilitation using the "Nintendo Wii" over a period of four weeks, and to compare with a group of patients receiving traditional upper limb rehabilitation of the same duration. The investigators hypothesize that the use of compensatory strategies will increase in the group receiving the "Wii" rehabilitation while they will decrease in the group receiving traditional rehabilitation. The investigators further hypothesize that this will have an impact on the functional benefit with a greater improvement of function in the group receiving traditional rehabilitation.

Inclusion Criteria:

Age 18 to 75 years Right handed Hemiparesis following vascular lesions of a single hemisphere of more than 6 months duration.

Not a regular 'Wii' user Able to bring the hand to the mouth. No botulinum toxin injections within the previous 3 months Having given informed consent

Exclusion Criteria:

Major cognitive or perceptive deficits Cerebellar syndrome Epileptic fits within the previous year Pacemaker user Un-corrected visual deficits No social security