 Cognitive and neuropsychological troubles may be observed, as memory impairment or anxiety for example. As this kind of troubles is worrying for the patient himself herself and hisher family, treatment needs to take into account those troubles in addition to motor difficulties. In our centre, we have already used continuous Apomorphine infusions among Parkinsons patients and it seems to have good results. The present study aims to objectively assess the efficacy of continuous Apomorphine infusions on cognitive and neuropsychological functions in Parkinsons disease using clinical and positron emission tomography PET-scan measures. 