... they complain of memory disorders In the setting of cognitive impairment, it is advisable to adapt L-dopa and, especially, dopaminergic agonists in the elderly They may provoke hallucinations and ... etiology, and treatment of depression in Parkinson's disease Biol Psychiatry 2003, 54:363-375 Kulisevsky J: Role of dopamine in learning and memory: implications for the treatment of cognitive dysfunction ... mobility or severe dysphonia A detailed history – in order to elucidate onset, course, profile, and chronology of cognitive and behavioral symptoms – must be complemented by neuropsychological testing...