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Evaluating the Function of the Foot Core System in the Elderly
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Published on: March 11, 2022

Corticomuscular coherence with and without additional task in the elderly.

Ashley N Johnson1, Minoru Shinohara

  • 1School of Electrical and Computer Engineering, Georgia Institute of Technology, 555 14th St., Atlanta, GA 30332-0356, USA.

Journal of Applied Physiology (Bethesda, Md. : 1985)
|January 7, 2012
PubMed
Summary
This summary is machine-generated.

Elderly adults show increased corticomuscular coherence during fine motor tasks, especially when combined with cognitive challenges. This neural activity pattern differs between young and older individuals, impacting motor control accuracy.

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Area of Science:

  • Neuroscience
  • Motor Control
  • Aging Research

Background:

  • Aging and dual-tasking often impair fine motor skills.
  • Neural mechanisms linking motor cortex and muscle activity during aging and dual tasks remain unclear.

Purpose of the Study:

  • To compare corticomuscular coherence between young and elderly adults.
  • To investigate neural activity during unilateral fine motor tasks and concurrent motor-cognitive tasks.

Main Methods:

  • Compared electroencephalogram (EEG) from the primary motor cortex and electromyogram (EMG) from the first dorsal interosseous muscle.
  • Analyzed peak corticomuscular coherence in alpha (8-14 Hz) and beta (15-32 Hz) bands.
  • Tested young (18-38 yr) and elderly (61-75 yr) adults during unilateral motor, bilateral motor, and concurrent motor-cognitive tasks.

Main Results:

  • Elderly adults exhibited greater alpha-band corticomuscular coherence, particularly during the motor-cognitive task.
  • Elderly adults showed higher beta-band corticomuscular coherence across motor and dual tasks.
  • Beta-band coherence correlated negatively with motor error in young adults, but not in elderly adults.

Conclusions:

  • Corticomuscular coherence increases with age, with cognitive load amplifying this effect in the alpha band.
  • Higher beta-band coherence is linked to better motor output accuracy in young adults, but this relationship is altered in the elderly.