Distinguishing the tremor of Parkinson's disease from essential tremor: finger displacement.
Lieberman A, Dhall R, Dhanani S, Salins N, Sadreddin A, Moguel-Cobos G, Pan D, Santiago A, Prigatano G, Krishnamurthi N, Troster A. Distinguishing the tremor of Parkinson's disease from essential tremor: finger displacement. Int J Neurosci. 2014 Mar; 124(3):175-80.