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Related Experiment Videos

Postural sensitivity to visual flow in aging adults with and without balance problems

L Sundermier1, M H Woollacott, J L Jensen

  • 1Department of Exercise and Movement Science, College of Arts and Sciences, University of Oregon, Eugene 97403-1240, USA.

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
|March 1, 1996
PubMed
Summary

Aging adults with balance issues rely more on visual cues for stability, showing greater sway and using hip movements for adjustments. This suggests potential underlying somatosensory deficits impacting their balance control.

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Area of Science:

  • Gerontology
  • Biomechanics
  • Neuroscience

Background:

  • Investigated balance behavior in young and aging adults.
  • Included participants with and without balance problems.
  • Examined responses to a moving visual surround stimulus.

Purpose of the Study:

  • To compare balance responses across different age groups and balance capabilities.
  • To understand the role of visual flow in postural control.
  • To identify potential underlying mechanisms for balance deficits in aging adults.

Main Methods:

  • Measured anterior/posterior center of foot pressure displacement and horizontal shear forces using force plates.
  • Recruited three groups: young adults (n=13), normal aging adults (n=13), and aging adults with balance problems (n=13).

Related Experiment Videos

  • Assessed responses to unexpected visual flow stimuli.

    • Main Results:

    • Aging adults with balance problems exhibited significantly greater sway responses compared to young adults when the visual stimulus was unexpected.
    • The balance-affected group also showed significantly greater shear forces than the young group.
    • Identified statistical outliers in sway responses within all groups.

    Conclusions:

    • Greater sway suggests an over-reliance on visual cues for postural control in aging adults with balance problems.
    • This over-reliance may indicate borderline somatosensory deficits.
    • Elevated shear forces suggest increased reliance on hip movements for postural adjustments in the balance-affected group.