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Aging and rapid aiming arm movement control

J H Yan1, J R Thomas, G E Stelmach

  • 1Department of Exercise Science and Physical Education, Arizona State University, USA. yan@exchange.uta.edu

Experimental Aging Research
|April 29, 1998
PubMed
Summary
This summary is machine-generated.

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Older adults exhibit slower reaction times and less consistent arm movements compared to younger adults. This suggests age-related declines in motor planning and increased reliance on visual feedback for executing movements.

Area of Science:

  • Neuroscience
  • Human Movement Science
  • Gerontology

Background:

  • Motor control and execution are crucial for daily activities.
  • Aging is associated with changes in motor performance.
  • Understanding age-related motor control differences informs interventions.

Purpose of the Study:

  • To investigate age-related differences in the motor control of target-oriented arm movements.
  • To compare young adults with two groups of older adults.

Main Methods:

  • Participants: young adults (20-30 years) and older adults (54-64 and 65-80 years).
  • Tasks: Two arm movement tasks with identical difficulty but varying directions.
  • Measures: Reaction time (RT), RT variability, movement time (MT), timing variability, inter-segment interval (ISI), and movement segment correlations.

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Main Results:

  • Older adults showed slower RT and greater RT variability than young adults.
  • Arm movements were slower and less consistent in older adults.
  • Increased timing variability, longer delays in direction reversal (ISI), and reduced inter-segment correlations were observed in older adults.

Conclusions:

  • Motor control quality in rapid arm movements declines with age.
  • Age-related motor deficits suggest reduced movement planning and increased reliance on visual feedback.