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Related Concept Videos

Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.

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Laterally focused attention modulates asymmetric coupling in rhythmic interlimb coordination.

Harjo J de Poel1, C Lieke E Peper, Peter J Beek

  • 1Institute for Fundamental and Clinical Human Movement Sciences, Amsterdam/Nijmegen, The Netherlands. h.depoel@fbw.vu.nl

Psychological Research
|October 6, 2006
PubMed
Summary

Handedness influences bimanual coordination by creating an attentional bias. Focusing attention on the non-dominant limb reduces this handedness-related asymmetry, suggesting a link between inherent and voluntary attentional biases.

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Area of Science:

  • Motor control
  • Human movement science
  • Cognitive neuroscience

Background:

  • Handedness may reflect an inherent attentional bias in motor control.
  • Previous studies show attention focus impacts interlimb coordination similarly to hand dominance.

Purpose of the Study:

  • To compare the effects of attentional focus and handedness on interlimb interactions.
  • To investigate how attentional asymmetries relate to handedness-related asymmetries.

Main Methods:

  • Rhythmic bimanual coordination tasks (in-phase and antiphase) were performed by left- and right-handed participants.
  • Attention was directed to either the left or right limb.
  • Mechanical perturbations assessed the degree of interlimb influence (coupling strength).

Main Results:

  • The dominant limb exerted a stronger influence on the non-dominant limb.
  • Focusing attention on the non-dominant limb reduced this handedness-related coupling asymmetry.
  • Attention focused on the dominant limb attenuated its phase lead, contrary to previous findings, possibly due to amplitude differences.

Conclusions:

  • Handedness-related asymmetries in interlimb coupling can be modulated by voluntary attentional focus.
  • Findings support the link between inherent (handedness) and voluntary attentional asymmetries in motor control.
  • Attention's effect on dominant limb phase lead may be influenced by limb-specific amplitude changes.