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Related Experiment Videos

Inhibitory control of attention declines more than working memory during normal aging.

J A Sweeney1, C Rosano, R A Berman

  • 1Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania, USA. sweeneyja@msx.upmc.edu

Neurobiology of Aging
|February 13, 2001
PubMed
Summary

Normal aging impairs executive functions, particularly inhibitory control, due to frontostriatal system changes. Elderly adults show slower sensorimotor responses but retain working memory, yet struggle with inhibiting eye movements.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Gerontology

Background:

  • Frontostriatal system changes are linked to reduced executive functions in aging.
  • Inhibitory control, crucial for attention and behavior, is particularly affected.

Purpose of the Study:

  • To investigate age-related changes in sensorimotor, working memory, and inhibitory attentional systems.
  • To characterize the impact of aging on frontostriatal system efficiency.

Main Methods:

  • Oculomotor paradigms were used to test 20 healthy elderly (65-80 years) and 28 young adults (18-34 years).
  • Tasks included visually guided saccades, oculomotor working memory, and antisaccade tests.

Main Results:

  • Elderly subjects exhibited decreased saccade peak velocity and increased reaction time, indicating sensorimotor decline.

Related Experiment Videos

  • Spatial working memory encoding and retrieval remained intact in older adults.
  • A significant deficit in voluntary inhibition of eye movements was observed in the elderly during the antisaccade task.

    • Conclusions:

    • Normal aging impacts frontostriatal systems, specifically impairing volitional inhibitory control.
    • While sensorimotor functions decline and inhibition is affected, spatial working memory processes are preserved in aging.