Cited by 132Pain Mechanisms and TreatmentsPain Management and TreatmentPain Management and Placebo Effect

Sex differences in temporal summation of pain and aftersensations following repetitive noxious mechanical stimulation

Sarlani, Eleni, Grace, Edward G, Reynolds, Mark A, Greenspan, Joel D·2004·Pain

Abstract

Several studies demonstrate that women are more sensitive to experimental pain than men. In addition, women exhibit greater temporal summation of heat and mechanically evoked pain. Since temporal summation of pain is centrally mediated, its greater expression in women suggests a central nociceptive hyperexcitability relative to men. The purpose of this study was to pursue this theory, by further assessing sex differences in (1) temporal summation of mechanically evoked pain, and (2) aftersensations following repetitive noxious stimulation. Sixteen series of 10 repetitive, mildly noxious, mechanical stimuli were applied to the fingers of 25 women and 25 age-matched men. The subjects rated the pain intensity and unpleasantness caused by the first, fifth and tenth stimulus in the series, as well as their aftersensations 15 s and 1 min following the end of stimulation. Data were analyzed by three-way repeated-measures analysis of variance. Pain and unpleasantness ratings increased with repetition of stimulation (P<0.0001). Temporal summation of pain intensity and unpleasantness ratings were more pronounced in women than men (P<0.0001). In addition, significant temporal summation occurred only with 2 s interstimulus interval for men (P<0.0005) but with 2 and 5 s interstimulus interval for women (P<0.0001). Moreover, women provided greater ratings for the intensity and the unpleasantness of aftersensations (P<0.0005) and reported painful aftersensations at greater frequency (P<0.05) Greater temporal summation of pain and aftersensations in women suggests that their central processing of nociceptive input may be more easily upregulated into pathological hyperexcitability, possibly accounting for the higher prevalence of various chronic pain conditions among women.

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Crossref · 10.1016/j.pain.2004.01.019

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Authors
Sarlani, E., Grace, E. G., Reynolds, M. A., & Greenspan, J. D.
Affiliations
University of Maryland, Baltimore (US)
Corresponding author
Sarlani, Eleni
Venue
Pain
Published
2004-05
Volume
109
Issue
1
Pages
115-123
ISSN
0304-3959 (ISSN-L)
OpenAlex
W2051311776
Cited by
132
References
50
Citations by year
2026: 2 · 2025: 5 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 4 · 2020: 3 · 2019: 6 · 2018: 9 · 2017: 4 · 2016: 6 · 2015: 5 · 2014: 9 · 2013: 3 · 2012: 12
FWCI
5.57
Type
journal article
Language
en
Open access
closed
Locations
  • Pain (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R01-NS39337, R01NS039337)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (P50AR049555, P50 AR 49555)
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Health Sciences › Medicine › Anesthesiology and Pain Medicine › Pain Management and Treatment
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
Keywords
sex differences, temporal summation of pain, mechanical pain, pain unpleasantness, interstimulus interval, central sensitization
MeSH terms
Adult, Analysis of Variance, Female, Hot Temperature, Humans, Male, Middle Aged, Nociceptors, Pain, Pain Measurement, Physical Stimulation, Sex Characteristics, Skin, Time Factors, Case-Control Studies, Pain Threshold

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