TREMORS IN PARKINSONS-DISEASE - SYMPTOM ANALYSIS AND RATING

The object of the present study was to evaluate the hand tremor occurr ing under various conditions in 81 patients with Parkinson's disease ( PD) and to statistically analyze their relation to clinical rating ite ms. We found that resting and action tremor have to be separated, wher eas postural tremor can be related to either one of them. Resting trem or does not correlate with disability items or performance items excep t for an item rating social handicaps. Action tremor shows some influe nce on performance items. Current rating scales of PD represent a vali d measure of resting tremor but are less valid for the measurement of action tremor.