Fig. 5.

Two components of variance in the finger mode space computed for the rhythmic IMRL tasks. A: variance of the elemental variables within the uncontrolled manifold (V_UCM) reflects the amount of variance that did not affect total force. B: variance orthogonal to the uncontrolled manifold (V_ORT) reflects the amount of variance that affected total force. Note the larger increase in V_UCM (than V_ORT) during fatigue for both the groups. Values are means ± SE. ★, Main effect of fatigue; +, fatigue × group interaction.