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Related Experiment Videos

Age-associated differences in responses to noxious stimuli.

R R Edwards1, R B Fillingim

  • 1Department of Psychology, University of Alabama at Birmingham, USA.

The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
|March 17, 2001
PubMed
Summary

Older adults exhibit increased sensitivity to ischemic pain, a clinically relevant stimulus, unlike thermal or mechanical pain. This suggests potential age-related changes in pain modulation systems.

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Area of Science:

  • Gerontology
  • Pain Research
  • Neuroscience

Background:

  • Population studies show increased clinical pain with age, contrasting with lab findings of decreased sensitivity.
  • Thermal stimuli dominate lab pain research, but ischemic pain may better reflect clinical pain.
  • This study investigates age effects on pain responses to diverse stimuli and cardiovascular links.

Purpose of the Study:

  • To examine age-related differences in pain perception using thermal, mechanical, and ischemic stimuli.
  • To explore correlations between cardiovascular measures and pain responses in younger and older adults.

Main Methods:

  • Assessed pain responses (thermal, mechanical, ischemic) in 34 younger (22.4 yrs) and 34 older (62.2 yrs) adults.
  • Utilized the modified submaximal effort tourniquet procedure for ischemic pain assessment.

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  • Correlated resting blood pressure with pain responses in each age group.

    • Main Results:

    • Older adults had significantly lower ischemic pain thresholds and tolerances (p < .01).
    • No significant age differences were found for thermal or mechanical pain responses.
    • Higher blood pressure correlated with increased pain thresholds/tolerances in younger adults, but not older adults.

    Conclusions:

    • Age-related pain sensitivity differs by stimulus type; older adults are more sensitive to clinically relevant ischemic pain.
    • The lack of blood pressure correlation with ischemic pain in older adults suggests possible impaired endogenous pain modulation.
    • Findings highlight the importance of stimulus modality in understanding age and pain.