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Related Experiment Videos

Effects of aging on hand function.

V K Ranganathan1, V Siemionow, V Sahgal

  • 1Department of Rehabilitation Medicine, The Lerner Research Institute, The Cleveland Clinic Foundation, Ohio 44195, USA.

Journal of the American Geriatrics Society
|March 14, 2002
PubMed
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Aging significantly impairs hand function, reducing grip strength, fine motor control, and sensory perception in older adults. These age-related declines impact daily activities requiring dexterity and force.

Area of Science:

  • Gerontology
  • Human Physiology
  • Biomechanics

Background:

  • Hand function is crucial for independence and quality of life.
  • Age-related changes in neuromuscular control can affect hand performance.
  • Quantifying these changes is essential for understanding functional decline.

Purpose of the Study:

  • To quantify age-associated changes in handgrip and finger-pinch strength.
  • To assess age-related differences in maintaining steady pinch force and posture.
  • To evaluate the impact of aging on manual dexterity and tactile sensory discrimination.

Main Methods:

  • Cross-sectional study comparing healthy young (20-35 years) and older (65-79 years) adults.
  • Measurements included handgrip strength, maximum pinch force (MPF), submaximal pinch force control, pinch posture maintenance, object relocation speed, and two-point discrimination.

Related Experiment Videos

  • Utilized standardized protocols to assess various aspects of hand function.

    • Main Results:

    • Older adults exhibited significantly reduced handgrip strength (30% weaker) and MPF (26% lower) compared to younger individuals.
    • The ability to maintain steady submaximal pinch force and precision pinch posture was significantly diminished in the older group.
    • Manual speed for object relocation and tactile sensory discrimination distance increased with age, indicating reduced dexterity and sensation.

    Conclusions:

    • Aging leads to a significant decline in overall hand function.
    • Key age-related deficits include reduced hand and finger strength, impaired control of submaximal pinch forces, and diminished postural stability.
    • Manual speed and sensory discrimination abilities also decrease with advancing age, impacting fine motor skills.