Effect of Contralateral Condition during Bimanual Pinch Force Control

Kazumi Critchley, Toshiyuki Kurihara, Tadao Isaka


The purpose of this study is to investigate the effect of the interaction of different control of the opposite side during bimanual finger pinch force output. Thirty two young adults (20.5±2.0y) participated in this study. Participants were requested to control their pinch forces at 10%MVF with visual feedback. Participants were asked to turn off their force output to zero (0%MVF) if visual feedback disappeared, and maintain their force output at 10%MVF when it’s appeared. There are 4 different force producing types: increase force output from 0 to 10%MVF (UP), decrease force output from 10 to 0%MVF (DOWN), keep maintaining 10%MVF (KEEP) and waiting at 0%MVF force output level (WAIT). The error trial was defined as when UP side of the hands’ force output exceeded 10.6%MVF. We calculated the error ratio as the number of error trials per total numbers of trial. The number of error ratio was the fewest on UP&UP, total 25/198 (Left: 17/96 Right: 8/96), followed by KEEP&UP total 52/192 (Left: 28/96, Right: 24/96) and WAIT&UP total 64/191 (Left: 40/96, Right: 24/95). Most mistakable condition was DOWN&UP, total 81/192 (Left: 50/96, Right: 31/96). The overshoot error ratio in right hand was lower than that of left hand.


  1. Franz, E. A. (1997). Spatial coupling in the coordination of complex actions. Q J Exp Psychol A, 50(3), 684- 704. doi: 10.1080/713755726.
  2. Harabst, K. B., Lazarus, J. A., & Whitall, J. (2000). Accuracy of dynamic isometric force production: the influence of age and bimanual activation patters. Motor Control, 4(2), 232-256.
  3. Mechsner, F., Kerzel, D., Knobiich, G., & Prinz, W. (2001). Perceptual basis of bimanual coordination. Nature, 414, 69-73.
  4. Oldfield, R. C. (1971). The assessment and analysis of handedness: the Edinburgh inventory. Neuropsychol, 9, 97-113.
  5. Sainburg, R. L. (2002). Evidence for a dynamicdominance hypothesis of handedness. Exp Brain Res, 142(2), 241-258. doi: 10.1007/s00221-001-0913-8.

Paper Citation

in Harvard Style

Critchley K., Kurihara T. and Isaka T. (2013). Effect of Contralateral Condition during Bimanual Pinch Force Control . In - icSPORTS, ISBN , pages 0-0

in Bibtex Style

author={Kazumi Critchley and Toshiyuki Kurihara and Tadao Isaka},
title={Effect of Contralateral Condition during Bimanual Pinch Force Control},
booktitle={ - icSPORTS,},

in EndNote Style

JO - - icSPORTS,
TI - Effect of Contralateral Condition during Bimanual Pinch Force Control
SN -
AU - Critchley K.
AU - Kurihara T.
AU - Isaka T.
PY - 2013
SP - 0
EP - 0
DO -