Effect of Sensory Deprivation on Maximal Force Abilities from Local to Non-local Digits

Publication Date

2019

Journal Title

J Mot Behav

Abstract

© 2019, Copyright © Taylor & Francis Group, LLC. The present study investigates the effect of sensory deprivation of the index and middle finger on motor function of all digits during maximal voluntary force production tasks. A total of 27 subjects performed maximal isometric pressing tasks by using different instructed finger combinations. Subjects completed the same tasks in two visits: a control visit when they had normal sensory feedback in all fingers, and an anesthesia visit when digital nerve blocks were performed on their right index and middle fingers. We evaluated three aspects of motor adaptation on both local (anesthetized) and non-local (non-anesthetized) digits during maximal force production: (1) task-relevant and overall force magnitude, (2) force directional application, and (3) digital individuation and force sharing. Our results indicate that selective digital anesthesia resulted in decreased maximal force magnitude, changed direction of force production, and significant changes extended to non-local digits. The motor weakness and inefficiency revealed in the non-local digits implies that sensory information from each digit can be shared across the digits to assist motor execution within the same hand.

Pages

1-13

Document Type

Article

Status

Faculty

Facility

School of Medicine

Primary Department

Emergency Medicine

PMID

30848722

DOI

10.1080/00222895.2019.1580670

Comments

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