 Introduction The motor impairment of the upper extremity is the most common sequelae after ischemic stroke. Transcranial magnetic stimulation TMS is a promising non- invasive technique in the rehabilitation of motor deficits. However, its effect in post-stroke motor deficits remains moderate our days. To potentiate the effect of TMS, techniques called Paired Associative Stimulations PAS involving the integration of afferent sensory inputs at the level of the ipsilesional primary motor cortex were developed in healthy subjects. PAS techniques have shown a gain of corticospinal excitability by such phenomenon known as long Term Potentiation LTP and a gain of motor performance. The investigators would like to propose to evaluate two types of these techniques with a volley of visual afferents visuomotor stimulation, V_PAS or of cerebellar afferents CER_PAS, because these two structures convey important information in the execution of the movement. 