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Compensatory mechanisms in the aging motor system.

Nick S Ward1

  • 1Wellcome Department of Imaging Neuroscience, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, United Kingdom. n.ward@fil.ion.ucl.ac.uk

Ageing Research Reviews
|August 15, 2006
PubMed
Summary

Aging affects motor functions and the brain

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Area of Science:

  • Neuroscience
  • Gerontology
  • Motor Control

Background:

  • Motor functions naturally decline with age.
  • Investigating age-related changes in the cerebral motor system is crucial.
  • Understanding potential compensatory mechanisms in older adults is of interest.

Purpose of the Study:

  • To examine age-related alterations in the organization of the cerebral motor system.
  • To investigate whether observed changes in motor system organization are compensatory.

Main Methods:

  • Primarily functional brain imaging techniques in human subjects.
  • Comparison of motor system activation between younger and older adults.
  • Acknowledging potential confounding factors like neurovascular changes in older subjects.

Main Results:

  • Older subjects generally exhibit greater motor task-related brain activity.
  • This increased activity involves a wider network of brain regions compared to younger subjects.
  • Evidence for these changes being compensatory remains inconclusive.

Conclusions:

  • Aging is associated with broader cerebral motor system activation.
  • The compensatory nature of these functional changes requires further investigation.
  • Integrating behavioral and anatomical data is essential for full interpretation.

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