close up view on the shaking hand of the senior woman,symptom of resting tremor or parkinson`s disease,old elderly patient holdin

aged brain caffeine care cerebellum close control degeneration disease disorders dysfunction elderly essential ganglia girl hand health holding hyperthyroidism inability involuntary lifestyle mental movement muscular nervous neurological old parkinson patient people person postural problem quivering resting senior shaking stick stress swelling symptom system tendon thyroid tremor vibrate walking weakness woman wrist