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Related Experiment Videos

Multiple frames of reference for bimanual co-ordination.

Herbert Heuer1

  • 1Institut für Arbeitsphysiologie an der Universität Dortmund, Ardeystrasse 67, 44139 Dortmund, Germany. heuer@ifado.de

Experimental Brain Research
|June 10, 2006
PubMed
Summary
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This study reveals how the brain uses hand-centered and body-centered reference frames to coordinate movements between hands. Adjustments in movement direction depend on hand-centered frames, while overall coordination involves both frames.

Area of Science:

  • Neuroscience
  • Motor Control
  • Human Movement Science

Background:

  • Intermanual interactions are modulated by task demands during motor preparation.
  • Previous research indicated parallel and symmetric coupling for parallel and symmetric movements, respectively.

Purpose of the Study:

  • To identify the frames of reference governing intermanual interactions for movement directions.
  • To investigate the roles of hand-centered and body-centered frames in motor adjustments.

Main Methods:

  • Utilized a timed-response procedure to analyze intermanual correlations in movement directions.
  • Manipulated target directions to assess adjustments in different frames of reference.

Main Results:

Related Experiment Videos

  • Movement direction adjustments remained consistent with lateral target rotations, highlighting hand-centered frames.
  • Increased intermanual correlations with rotated targets suggested a body-centered frame's involvement.
  • Intermanual interference was absent at long preparation intervals, even with differing body-centered eccentricities.

    • Conclusions:

    • Both body-centered and hand-centered frames of reference are crucial for adapting intermanual interactions to task requirements.
    • A hand-centered frame of reference uniquely influences residual intermanual interference despite adjustments.