Gesture Decoding Using ECoG Signals from Human Sensorimotor Cortex: A Pilot Study

Figure 1

The behavioral task and recordings. (a) Hand grasp experimental paradigm. The trial was initiated by a red cross displayed on the center of the screen with a verbal cue “ready.” After a random delay ranging from 2 to 2.5 s, the red cross disappeared and the gesture cue appeared on the screen, indicating the participant to replicate the gesture shown and hold on it until the red dot came out 2-3 seconds later. The correction of the trial was fed back by another verbal cue at the end of the trial. Three types of the gestures were displayed randomly and equally. (b) The flexion of the data glove sensors on ring finger, index finger, and thumb. Purple dash line represented the timing when visual cue was displayed.

(a)

(b)