Unilateral practice of a ballistic movement causes bilateral increases in performance and corticospinal excitability

Carroll, T.J., Lee, M., Hsu, M. and Sayde, J. (2008) Unilateral practice of a ballistic movement causes bilateral increases in performance and corticospinal excitability. Journal of Applied Physiology, 104 6: 1656-1664. doi:10.1152/japplphysiol.01351.2007


Author Carroll, T.J.
Lee, M.
Hsu, M.
Sayde, J.
Title Unilateral practice of a ballistic movement causes bilateral increases in performance and corticospinal excitability
Journal name Journal of Applied Physiology   Check publisher's open access policy
ISSN 8750-7587
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1152/japplphysiol.01351.2007
Open Access Status
Volume 104
Issue 6
Start page 1656
End page 1664
Total pages 9
Editor Dempsey, J.A.
Place of publication Bethesda, MD
Publisher American Physiological Society
Language eng
Subject 170112 Sensory Processes, Perception and Performance
110603 Motor Control
970117 Expanding Knowledge in Psychology and Cognitive Sciences
C1
Abstract It has long been known that practicing a task with one limb can result in performance improvements with the opposite, untrained limb. Hypotheses to account for cross-limb transfer of performance state that the effect is mediated either by neural adaptations in higher order control centers that are accessible to both limbs, or that there is a "spillover" of neural drive to the opposite hemisphere that results in bilateral adaptation. Here we address these hypotheses by assessing performance and corticospinal excitability in both hands after unilateral practice of a ballistic finger movement. Participants (n = 9) completed 300 practice trials of a ballistic task with the right hand, the aim of which was to maximize the peak abduction acceleration of the index finger. Practice caused a 140% improvement in right-hand performance and an 82% improvement for the untrained left hand. There were bilateral increases in the amplitude of responses to transcranial magnetic stimulation, but increased corticospinal excitability was not correlated with improved performance. There were no significant changes in corticospinal excitability or task performance for a control group that did not train (n = 9), indicating that performance testing for the left hand alone did not induce performance or corticospinal effects. Although the data do not provide conclusive evidence whether increased corticospinal excitability in the untrained hand is causally related to the cross-transfer of ballistic performance, the finding that ballistic practice can induce bilateral corticospinal adaptations may have important clinical implications for movement rehabilitation.
Keyword Physiology
Sport Sciences
Physiology
Sport Sciences
PHYSIOLOGY
SPORT SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Human Movement and Nutrition Sciences Publications
 
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