Raw data from one control subject (left panels) and one stimulant subject (right panels) during trial one of the grip and lift task.

<p>A and B) Raw traces of first dorsal interosseus EMG (top panel), grip force (2^nd panel), lift force (3^rd panel), and acceleration (bottom panel). The task was divided into two phases: lift (dynamic) phase and hold (stationary) phase. The lift phase ranged from 0<i> </i>s (lift onset) to 1.5<i> </i>s and the hold phase ranged from 1.5 to 2.5<i> </i>s. C and D) Temporal characteristics of grip force and lift force. The derivative of grip force (i.e. dGF/dt, inset) was correlated with the derivative of lift force (dLF/dt) and the resultant cross-correlogram is shown. Vertical dashed lines in C and D represent the time shift required to achieve the maximal cross-correlation coefficient.