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Related Experiment Videos

Aging and spatial acuity of touch.

J C Stevens1

  • 1John B. Pierce Laboratory, New Haven, Connecticut.

Journal of Gerontology
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

Fingertip spatial acuity significantly declines with age, impacting tactile perception. This age-related sensory loss affects middle-aged and elderly individuals, potentially hindering tactile reading methods.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Sensory Physiology

Background:

  • Skin's spatial acuity, particularly on the fingertip, is crucial for tactile perception.
  • Age-related changes in sensory function can impact daily activities and assistive technologies.

Purpose of the Study:

  • To quantify the age-related decline in fingertip spatial acuity.
  • To assess the implications of diminished tactile acuity for sensory-handicapped individuals.

Main Methods:

  • Two-point thresholds were measured using a forced-choice method in 80 subjects aged 18–91 years.
  • Tactile acuity was also assessed on the arm in younger and elderly subsets.

Main Results:

  • Mean 2-point threshold increased significantly with age: 1.95 mm (young), 2.68 mm (middle-aged), and 5.03 mm (elderly).

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  • Age accounted for over half the variance in tactile spatial acuity (r = .74).
  • While present, age-related differences in arm tactile acuity were less pronounced than on the fingertip.

    • Conclusions:

    • Fingertip spatial acuity markedly deteriorates with age, affecting a majority of older adults.
    • This age-related impairment in tactile spatial resolution may pose challenges for tactile reading systems like braille and Optacon.