title: ECT, opioid system, and motor response in Parkinson's disease .
mesh_terms: D001921:Brain / Q000378:metabolism; D004565:Electroconvulsive Therapy; D006801:Humans; D010300:Parkinson Disease / Q000378:metabolism / Q000628:therapy*; D011957:Receptors, Opioid / Q000378:metabolism*
chemical_list: D011957:Receptors, Opioid