Inter-limb coupling of proximal and distal hand actions

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http://hdl.handle.net/10138/311335

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Vainio , L & Tiainen , M 2018 , ' Inter-limb coupling of proximal and distal hand actions ' , Experimental Brain Research , vol. 236 , no. 1 , pp. 153-160 . https://doi.org/10.1007/s00221-017-5114-1

Title: Inter-limb coupling of proximal and distal hand actions
Author: Vainio, Lari; Tiainen, Mikko
Contributor: University of Helsinki, Medicum
University of Helsinki, Medicum
Date: 2018-01
Language: eng
Number of pages: 8
Belongs to series: Experimental Brain Research
ISSN: 0014-4819
URI: http://hdl.handle.net/10138/311335
Abstract: Past studies have revealed connections in directional programming between hands. The present study investigated whether there could also be interaction in programming proximal and distal components of a prehensile hand action. In Experiment 1, the participants performed simultaneously either a push or pull response with the left hand and the grip closure or opening with the right hand. In Experiment 2, the push and pull responses of the left hand were performed together with the precision or power grip responses of the right hand. The participants showed preference, measured in reaction times, to couple the push response with the grip opening and the precision grip, whereas the pull response was associated with the grip closure and the power grip. The study shows for the first time a systematic interaction in proximal and distal prehensile components between two hands. We propose that these effects reflect inter- and intra-limb connections between the representations that prepare the arm extension for the outward reaching, the finger extension for the grip opening, and the motor processes that prepare the precision grip. Conversely, there appear to be connections between the representations that prepare the arm flexion for the inward directed hand movements, the flexion of the thumb and the fingers for the grip closure, and flexion of four fingers for the power grip.
Subject: Action planning
Grasping
Reaching
Interlimb connections
Behavioural study
Reaction time
HUMAN PARIETAL
COORDINATION
MOVEMENTS
CONSTRAINTS
DIRECTION
ARM
REPRESENTATIONS
IDENTIFICATION
SPECIFICATION
PREHENSION
515 Psychology
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