Spontaneous and intentional pattern switching in a multisegmental bimanual coordination task

Byblow, Winston D., Summers, Jeffery J., Semjen, Andras, Wuyts, Irina J. and Carson, Richard G. (1999) Spontaneous and intentional pattern switching in a multisegmental bimanual coordination task. Motor Control, 3 4: 372-393.

Author Byblow, Winston D.
Summers, Jeffery J.
Semjen, Andras
Wuyts, Irina J.
Carson, Richard G.
Title Spontaneous and intentional pattern switching in a multisegmental bimanual coordination task
Journal name Motor Control   Check publisher's open access policy
ISSN 1087-1640
Publication date 1999
Sub-type Article (original research)
Volume 3
Issue 4
Start page 372
End page 393
Total pages 22
Place of publication Champaign, Ill
Publisher Human Kinetics
Collection year 1999
Language eng
Subject C1
730104 Nervous system and disorders
321403 Motor Control
Abstract Two experiments required right-handed subjects to trace circular trajectories while complying with either a symmetric or asymmetric pattern. In symmetric patterns, circles were traced in a mirror image either inward or outward. In asymmetric patterns, circles were traced in the same direction either clockwise or counterclockwise. Subjects were instructed to trace with spatial accuracy white maintaining a strict temporal relationship to a metronome that scaled movement rates from 1.25 to 3 Hz. The symmetric patterns were more stable than asymmetric patterns; the circularity of trajectories was greater for the dominant side; and there were spontaneous reversals in the direction of circling in the nondominant limb when performing asymmetric patterns. The second experiment examined the same subjects under the instruction of intentionally changing the pattern by reversing the left or right limb circling direction when cued to do so. The degree of interlimb interference was highly asymmetric and contingent on the direction of pattern change. Intentional direction reversals were more expedient and with less disruption to the contralateral limb when asymmetric to symmetric pattern changes were effected through a reversal in the direction of nondominant side. The results are interpreted with reference to evidence that the supplementary motor area mediates descending input to the upper limbs during disparate bimanual actions, but not during symmetric actions.
Keyword Neurosciences
Sport Sciences
Manual Asymmetries
Coordination Dynamics
Voluntary Movement
Supplementary Motor Area
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Human Movement and Nutrition Sciences Publications
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Created: Tue, 10 Jun 2008, 14:21:56 EST