Dynamic dominance persists during unsupported reaching

Tucker Tomlinson, Robert Sainburg

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Previous studies examining lateralization of arm movements focused on supported movements in the horizontal plane, removing the effects of gravity. The authors hypothesized that interlimb differences in free reaching would be consistent with the differences shown during supported reaching. Kinematic and kinetic data were collected for the forearm and upper arm segments in a 3-direction reaching task. Results showed lateralization of coordination, reflected by initial movement direction and trajectory curvature. The nondominant arm showed increased initial direction errors, and path curvature associated with a timing deficit between elbow and shoulder peak torques. These coordination deficits did not disrupt final position accuracy. The authors conclude that nondominant arm coordination deficits are similar to those reported previously for horizontal plane movements.

Original languageEnglish (US)
Pages (from-to)13-25
Number of pages13
JournalJournal of motor behavior
Volume44
Issue number1
DOIs
StatePublished - Jan 1 2012

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All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

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