I am putting up this enquiry for my father, 64 yrs old. He start to experience shaky hands when he holds something for few seconds, preferable while holding glass of water or phone. He experiences slow down in movement of body. When he is sitting or sleeping, he takes lot of time to get up. Remarkable slow down in walking speed over a period of time. He took consultation earlier also but we dnt see any  improvement. We keep monitoring his BP, it remains normal. Kindly suggest what treatment is recomended for him.