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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration
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Visual-Somatosensory Integration and Quantitative Gait Performance in Aging.

Jeannette R Mahoney1, Joe Verghese1,2

  • 1Division of Cognitive and Motor Aging, Department of Neurology, Albert Einstein College of Medicine, Bronx, NY, United States.

Frontiers in Aging Neuroscience
|December 13, 2018
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Summary

Impaired visual-somatosensory integration in older adults is linked to poorer gait pace and stride length control. This study highlights how combining visual and body-sense information impacts mobility in aging populations.

Keywords:
fallsgaitmobilitymultisensory processingsensorimotor integration

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Area of Science:

  • Neuroscience
  • Gerontology
  • Biomechanics

Background:

  • Multisensory integration is crucial for mobility.
  • The link between visual-somatosensory (VS) integration and gait in aging is not well understood.

Purpose of the Study:

  • To investigate the association between VS integration and gait performance in healthy older adults.
  • To determine if VS integration impacts gait pace, rhythm, or variability.

Main Methods:

  • 333 healthy older adults underwent VS simple reaction time tasks and quantitative gait analysis.
  • VS integration magnitude was modeled and classified (superior, good, poor, deficient).
  • Linear regression analyzed associations between VS integration and gait factors (Pace, Rhythm, Variability).

Main Results:

  • VS integration magnitude significantly predicted gait pace (p < 0.05).
  • No significant association was found between VS integration and gait rhythm (p = 0.83).
  • Worse VS integration correlated with increased stride length variability (p = 0.03).

Conclusions:

  • Reduced VS integration in aging is associated with impaired spatial gait parameters, specifically pace and stride length.
  • Temporal gait aspects, like rhythm, appear less affected by VS integration deficits in older adults.