231 Effect of visual feedback time on bimanual pinch force control

Abstract

In the present pinch tasks, participants were asked to maintain target pinch force level for left and right hand of 10% maximal voluntary force (MVF) for 40 seconds. The current amplitudes of left and right pinch force were displayed with visual cursors. In no visual feedback conditions, one or both side of the cursors disappeared 10 seconds after beginning of the task. Results showed that errors of the pinch force increased after disappearance of visual feedback. Also cross-correlation coefficient increased soon after disappearance of visual feedback in only condition that disappear both side of visual feedback.