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Related Experiment Video

Updated: May 11, 2026

Determining Pain Detection and Tolerance Thresholds Using an Integrated, Multi-Modal Pain Task Battery
09:38

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Published on: April 14, 2016

Cardiovascular influences on conditioned pain modulation.

Philippe Chalaye1, Laurent Devoize, Sylvie Lafrenaye

  • 1Department of Surgery, Université de Sherbrooke, Sherbrooke, Québec, Canada.

Pain
|May 23, 2013
PubMed
Summary
This summary is machine-generated.

Conditioned pain modulation (CPM), a pain inhibition process, is linked to blood pressure increases during conditioning stimuli. Higher resting blood pressure correlates with greater pain tolerance in healthy individuals.

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Area of Science:

  • Neuroscience
  • Physiology
  • Pain Research

Background:

  • Conditioned pain modulation (CPM) involves pain reduction via remote noxious stimuli.
  • Cardiovascular responses, including blood pressure changes, accompany CPM.
  • Previous studies suggest a link between higher blood pressure and reduced pain sensitivity.

Purpose of the Study:

  • To investigate the association between CPM and cardiovascular responses during the cold-pressor test (CPT).
  • To determine if blood pressure changes during CPT influence pain modulation.

Main Methods:

  • Evaluated heat pain threshold and tolerance in 26 healthy subjects.
  • Assessed CPM by comparing heat pain before and after a 5-minute CPT at 7°C.
  • Monitored heart rate, blood pressure, and baroreflex sensitivity during rest and CPT.

Main Results:

  • A positive relationship was found between resting blood pressure and heat pain tolerance.
  • CPT induced significant increases in heart rate and blood pressure, demonstrating effective CPM.
  • CPM magnitude positively correlated with the increase in blood pressure during CPT.

Conclusions:

  • Resting blood pressure is related to acute pain tolerance.
  • Descending pain inhibition (CPM) is associated with blood pressure elevation during conditioning.
  • Blood pressure rise during CPT predicts the degree of endogenous pain inhibition.