From Tremor to Movement: Differences in Variability and Coupling During Bilateral Finger Actions

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Title From Tremor to Movement: Differences in Variability and Coupling During Bilateral Finger Actions
Author Morrison, S.; Tucker, Murray; Barrett, Rod
Journal Name Motor Control
Year Published 2012
Place of publication United States
Publisher Human Kinetics
Abstract This study examined changes in movement variability, coupling, and muscle activity across three different bilateral finger movements (e.g., postural, isometric, and isotonic). It was predicted that movements characterized by increased interlimb coupling would be associated with increased levels of muscle activity and reduced movement variability. The results demonstrated task-specific differences in interlimb relations with coupling being lowest during postural tasks and highest under isotonic conditions. However, a similar pattern was not observed for muscle activity and movement variability. Of the three tasks, postural tremor movements were more variable and had lower levels of muscle activity. Alternatively, increased muscle activity and more regular movement dynamics were seen under isometric conditions. Overall, it would appear that differences in bilateral coupling across tasks are not reflective of a single driving mechanism but rather reflect differential contribution from intrinsic neuromuscular and mechanical sources.
Peer Reviewed Yes
Published Yes
Publisher URI http://journals.humankinetics.com/mc-back-issues/mc-volume-16-issue-1-january1/from-tremor-to-movement-differences-in-variability-and-coupling-during-bilateral-finger-actions
Volume 16
Page from 31
Page to 49
ISSN 1087-1640
Date Accessioned 2012-05-24; 2012-08-08T23:45:32Z
Date Available 2012-08-08T23:45:32Z
Research Centre Centre for Musculoskeletal Research; Griffith Health Institute
Faculty Griffith Health Faculty
Subject Biomechanics
URI http://hdl.handle.net/10072/46111
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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