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Related Experiment Video

Updated: Jun 14, 2026

A Method to Quantify Visual Information Processing in Children Using Eye Tracking
09:47

A Method to Quantify Visual Information Processing in Children Using Eye Tracking

Published on: July 9, 2016

Age-related differences in force variability and visual display.

Edward Ofori1, Jean M Samson, Jacob J Sosnoff

  • 1Motor Control Research Laboratory, Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 241 Freer Hall, 906 S. Goodwin Ave, Urbana, IL 61801, USA. eofori2@illinois.edu

Experimental Brain Research
|March 31, 2010
PubMed
Summary
This summary is machine-generated.

Older adults show greater force variability and more structured output than younger adults, especially with pursuit visual displays. This suggests age-related declines in visuomotor control impact force regulation.

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Area of Science:

  • Neuroscience
  • Human Motor Control
  • Aging Research

Background:

  • Older adults exhibit increased variability in force production.
  • Visuomotor processing is implicated in age-related force control deficits.

Purpose of the Study:

  • To investigate if visual display type influences age-related differences in force output control.
  • To understand the role of visual feedback in age-related motor performance variations.

Main Methods:

  • Young and old participants performed isometric index finger abduction tasks at 5%, 10%, and 20% maximal voluntary contraction (MVC).
  • Visual feedback was provided using either compensatory or pursuit displays.
  • Force variability (standard deviation, coefficient of variation) and output structure (spectral slope, approximate entropy) were analyzed.

Main Results:

  • Older adults demonstrated significantly higher force variability and more structured force output compared to younger adults.
  • Age-related differences in force control were more pronounced with pursuit displays.
  • Force control decrements in older adults were evident across different force levels.

Conclusions:

  • Age-related differences in force control are primarily mediated by central nervous system processes.
  • Deficits in visuomotor processing, potentially linked to eye movement control, contribute to age-related force control impairments.
  • The type of visual display significantly modulates age-related force control performance.