Fig. 1.

Cued finger movement task. Subjects were shown a silhouette of a hand on a computer screen. At the start of each trial, subjects were instructed to flex the finger that was highlighted with a unique color on the hand silhouette or to make a pinching motion when both thumb and index fingers were highlighted. After 2s of repetitive motion the screen became blank, signaling a rest period of 1s. This was repeated between 10 to 30 times for each finger and same number of trials for the pinch. The trial types were alternated randomly so that each trial remained novel to the subject. Finger movements were recorded with a dataglove and time-locked with ECoG signals.