The effect of exercise of unaffected upper limb with physiotherapy in stroke patients

INTERVENTION: participants have the exercise that induce light fatigue. the exercise of upper limb (10 min) rehabilitaion of upper limb (40 min) participants have the exercise that do not induce light fatigue. the exercise of upper limb (10 min) rehabilitaion of upper limb (40 min) CONDITION: stroke PRIMARY OUTCOME: the change of intracortical inhibition SECONDARY OUTCOME: motor threshold; pinch force; drawing circle.; acceleration of finger INCLUSION CRITERIA: stroke patients Brunnstrom stage of upper limb no less than 3 Participants can pinch movement by thum and index finger. inpatients and out patinets of Kagoshima University Hospital