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Related Experiment Videos

Posture and target location effects on manual preference.

D A Westwood1, E A Roy, P J Bryden

  • 1University of Waterloo.

Brain and Cognition
|June 17, 2000
PubMed
Summary
This summary is machine-generated.

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Balancing on a rocker platform altered manual preference, reducing right-hand use for targets in the left visual field. This suggests posture influences hand selection to minimize effort during unimanual movements.

Area of Science:

  • Motor Control
  • Human Movement Science
  • Biomechanics

Background:

  • Manual preference, the tendency to favor one hand over the other, is a fundamental aspect of human motor behavior.
  • Understanding how environmental factors, such as postural stability, influence manual preference is crucial for fields like ergonomics and rehabilitation.

Purpose of the Study:

  • To investigate the impact of postural demands on manual preference during unimanual reaching movements.
  • To determine if balancing on an unstable surface affects hand selection compared to stable standing.

Main Methods:

  • Twenty-nine right-handed individuals performed unimanual movements to five target locations.
  • Participants completed tasks in two conditions: stable standing and balancing on a rocker platform.

Related Experiment Videos

  • Manual preference was assessed by recording hand responses for each target location.

    • Main Results:

    • Manual preference was significantly influenced by both target location and postural condition.
    • Participants showed a reduced preference for the right hand when balancing on the rocker platform, particularly for targets in the left hemispace.
    • A significant interaction between target location and posture indicated that postural effects on manual preference were hemispace-specific.

    Conclusions:

    • Postural instability, such as balancing on a rocker platform, can modulate manual preference.
    • The findings suggest that motor control strategies adapt to reduce neural and mechanical costs under challenging postural conditions.
    • Manual preference is not fixed but is a dynamic process influenced by the interplay of target demands and postural stability.