Patients with an implantable electrical nerve stimulation system Patient criteria included: over 18 years of age,MMSE≥ 24 score; H-Y stage in medicine off condition>2.0;an ability to walk at least 10 meters independently;subscore≥2 for UPDRS part II item 15;subscore >1 for UPDRS part II item 14; permissions given by informed consent. Patients with serious diseases such as tumor, sever liver or kidney dysfunction were not selected in the clinical trials. Subjects participating in other clinical trials related or not related to these trials were not chosen.

Inclusion Criteria:

• Age >18 years of age,male or female patients
• idiopathic Parkinson's disease
• had deep brain stimulaton implant
• H-Y>2.0 in the absence of L-dopa
• UPDRSII-14 item ≥1
• UPDRSII-15 item ≥2
• an ability to walk at least 10 meters independently

Exclusion Criteria:

• Patients with serious diseases such as tumor, sever liver or kidney dysfunction were not selected in the clinical trials
• epilepsy
• Pregnant female
• History of severe neuropsychiatric disease
• Patients are taking part in other clinical trials in recent several months