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Anger Inhibition and Pain Modulation.

Tyler A Toledo1, Natalie Hellman1, Edward W Lannon1

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Summary

Inhibiting anger, known as anger-in, is linked to increased pain perception. This study suggests anger-in may impair cognitive resources, leading to greater pain sensitivity.

Keywords:
AttentionEmotion inhibitionEmotion regulationPainPain risk

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Area of Science:

  • Psychology
  • Neuroscience
  • Pain Research

Background:

  • The tendency to inhibit anger (anger-in) is correlated with heightened pain perception.
  • Two hypotheses explain this link: negative affectivity (anger-in increases negative emotions, thus pain) and cognitive resource depletion (anger-in consumes resources needed for pain modulation).

Purpose of the Study:

  • To investigate the impact of anger-in on emotional and attentional modulation of pain.
  • To differentiate between the negative affectivity and cognitive resource hypotheses in healthy individuals.

Main Methods:

  • A picture-viewing paradigm was employed with 98 healthy participants, categorized as low or high on anger-in.
  • Pain was induced using electrocutaneous stimulation, with subjective and physiological measures assessing pain, emotional responses, and attentional modulation.
  • The nociceptive flexion reflex (NFR) was measured as a physiological correlate of spinal nociception.

Main Results:

  • Individuals with high anger-in reported less unpleasantness and showed fewer negative facial expressions to unpleasant stimuli.
  • Despite differences in emotional reporting, both high and low anger-in groups exhibited similar emotional modulation of pain and NFR.
  • Crucially, the high anger-in group failed to demonstrate attentional modulation of pain.

Conclusions:

  • Findings support the cognitive resource hypothesis, indicating that anger-in may deplete attentional resources, increasing pain risk.
  • The results suggest that anger-in impacts pain processing primarily through supraspinal mechanisms, as only direct pain perception, not the NFR, was associated with anger-in.