Downward finger displacement distinguishes Parkinson disease dementia from Alzheimer disease.
Lieberman A, Deep A, Shi J, Dhall R, Shafer S, Moguel-Cobos G, Dhillon R, Frames CW, McCauley M. Downward finger displacement distinguishes Parkinson disease dementia from Alzheimer disease. Int J Neurosci. 2018 Feb; 128(2):151-154.