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Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
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Attentional demands associated with postural control depend on task difficulty and visual condition.

Anthony Remaud1, Sébastien Boyas, Guillaume A R Caron

  • 1Aging and Movement Research Laboratory, Élisabeth Bruyère Research Institute, Bruyère Continuing Care, Ottawa, Ontario, Canada. aremaud@bruyere.org

Journal of Motor Behavior
|September 1, 2012
PubMed
Summary
This summary is machine-generated.

Vision significantly impacts attentional resource allocation for postural control. Removing vision increases attentional demands, especially with reduced base of support, but vision can compensate for difficult tasks.

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Area of Science:

  • Human movement science
  • Cognitive neuroscience
  • Applied physiology

Background:

  • Postural control is crucial for daily activities.
  • Attentional resources are finite and can be reallocated.
  • The role of vision in modulating attention for balance is not fully understood.

Purpose of the Study:

  • To investigate how vision affects attentional resource allocation during postural control.
  • To examine the influence of task difficulty on this relationship.
  • To assess the test-retest reliability of postural and cognitive measures.

Main Methods:

  • Twenty adults performed quiet standing tasks on a force platform under various conditions.
  • Conditions included different bases of support, vision (present/absent), and a secondary reaction time task.
  • Postural sway and reaction time were measured to assess attentional demands.

Main Results:

  • Postural control was impaired by reduced base of support and absence of vision.
  • Quiet standing demanded attentional resources, evidenced by increased reaction time compared to seated.
  • Postural steadiness changes correlated with reaction time changes, linking task difficulty to attention.

Conclusions:

  • Vision plays a compensatory role in attentional resource allocation for postural control.
  • Difficult postural tasks increase attentional demands, particularly when vision is absent.
  • Reliable measures of postural and cognitive function were obtained, supporting dual-task methodology.