Patients with Parkinson's disease (PD) suffer from motor fluctuations and levodopa induced dyskinesia. The prupose of this study is to evaluate the effect of an automatic system to assess the motor state of PD patients in real daily life. Movements and postures are assessed using 6 accelerometers attached to the the most affected wrist, trunk, both upper legs and both upper arms. Patients wear the system for two days and keep an own diary of their motor state