Asymmetric Control of Bilateral Isometric Finger Forces

Overview

Journal Exp Brain Res

Specialty Neurology

Date 1995 Jan 1

PMID 7498383

Citations 9

Authors

H Henningsen

A M Gordon

Affiliations

Soon will be listed here.

Abstract

We examined the ability to match the voluntary isometric finger flexion forces of the dominant and nondominant hand in humans, as well as the influence of unilateral visual feedback during this task. Right- and left-handed subjects were trained to produce a "low" force level (50 +/- 25 g) and a "high" force level (200 +/- 50 g) with the right and left index finger, separately. Following the training session, subjects were instructed to match the isometric forces of both fingers simultaneously within the required range (either low or high) so that they were perceived to be identical. The results showed an asymmetry, whereby greater forces were exerted with the index finger of the dominant hand. The asymmetry was independent of the subjects' maximum finger flexion strength. When unilateral visual feedback represented the force output of the dominant hand, the asymmetry was no longer present. In contrast, when it represented the force output of the nondominant hand, the asymmetry was not compensated. We hypothesize that these findings are the result of anatomical or physiological asymmetries inherent in the motor system controlling the production of force.

Citing Articles

Upper Limb Asymmetry in the Sense of Effort Is Dependent on Force Level.

Mitchell M, Martin B, Adamo D Front Psychol. 2017; 8:643.

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Effects of laparoscopic instrument and finger on force perception: a first step towards laparoscopic force-skills training.

Prasad M, Manivannan M, Chandramohan S Surg Endosc. 2014; 29(7):1927-43.

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Asymmetry in grasp force matching and sense of effort.

Adamo D, Scotland S, Martin B Exp Brain Res. 2012; 217(2):273-85.

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Scaling analysis of bilateral hand tremor movements in essential tremor patients.

Blesic S, Maric J, Dragasevic N, Milanovic S, Kostic V, Ljubisavljevic M J Neural Transm (Vienna). 2011; 118(8):1227-34.

PMID: 21331462 DOI: 10.1007/s00702-011-0581-1.

Finger force perception during ipsilateral and contralateral force matching tasks.

Park W, Leonard C, Li S Exp Brain Res. 2008; 189(3):301-10.

PMID: 18488212 PMC: 2889908. DOI: 10.1007/s00221-008-1424-7.

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