Fig. 3.
Typical within-session behavioral and neuronal changes. A: hand position (top left) and hand speed (top right) for an example session in which counterclockwise forces were applied on force-field trials (red). The position and speed are shown for the first five and last five trials in the 248° target direction of each epoch. Performance on each trial was quantified by path deviation area (bottom left) and velocity correlation coefficient (bottom right). The linear regression lines highlight the field-induced perturbation (red, line offset), adaptation (red, line slope), aftereffect (green, offset), and deadaptation (green, slope). B: perievent raster plot and histogram of the activity of an example unit. The unit had transient cue-related, movement-related, and reward-related activity. During force-field trials, the movement-related activity increased.