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Aging differentially affects alpha and beta sensorimotor rhythms in a go/nogo task.

Christina Schmiedt-Fehr1, Birgit Mathes1, Shwetha Kedilaya1

  • 1University of Bremen, Institute of Psychology and Cognition Research, Bremen, Germany; Centre for Cognitive Science, Germany.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|August 15, 2016
PubMed
Summary

Aging selectively impacts brain rhythms. Older adults show altered beta and alpha oscillations, suggesting neural over-recruitment and distinct aging trajectories for sensorimotor brain activity.

Keywords:
AgingAlpha oscillationsBeta oscillationsBrain oscillationsEEGEROGo/nogoInhibitionMovement

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Area of Science:

  • Neuroscience
  • Cognitive Aging
  • Motor Control

Background:

  • Sensorimotor brain oscillations, specifically alpha and beta rhythms, play crucial roles in motor control.
  • Understanding how these rhythms change with age is vital for comprehending age-related cognitive and motor alterations.

Purpose of the Study:

  • To compare sensorimotor alpha and beta brain oscillations between young and older adults.
  • To investigate the functional distinctness of alpha and beta rhythms and their susceptibility to aging.

Main Methods:

  • Utilized electroencephalography (EEG) to record brain activity.
  • Compared event-related spectral perturbation in alpha and beta bands during a go/no-go task in young (23±3 years) and older adults (64±7 years).

Main Results:

  • Beta rhythms showed age-selective differences: younger adults exhibited less attenuation during movement and a greater rebound post-movement compared to older adults.
  • Alpha rhythms differed post-response inhibition, with older adults displaying an additional alpha rebound not observed in younger adults.

Conclusions:

  • Results suggest neural over-recruitment in healthy aging, potentially linked to sensory and cognitive motor control factors.
  • The findings imply that sensorimotor alpha and beta rhythms follow distinct neural trajectories during the aging process.