Figure 4.

Example of tremor data from an essential tremor patient performing the postural task. (A) Wrist acceleration; (B) identified motor unit firings for the wrist extensors (red squares) and flexors (blue squares) along with the corresponding smoothed CST (red and blue solid lines; the blue trace is inverted for representation purposes). Each square denotes a single motor unit firing. Firings of different motor units are depicted with different vertical offset; (C) power spectrum of the smoothed CST (red solid line for wrist extensors and blue solid line for wrist flexors) compared to that of the wrist acceleration data (black solid line).