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Pain perception in patients with eating disorders.
S Lautenbacher1, A M Pauls, F Strian
1Max Planck Institute for Psychiatry, Clinical Department, Munich, Federal Republic of Germany.
Psychosomatic Medicine
|November 1, 1990
Summary
Eating disorder patients, particularly those with bulimia, exhibit elevated heat pain thresholds. This suggests a non-opioid mechanism, not related to dieting or cortisol levels, may be involved.
Area of Science:
- Neuroscience
- Psychiatry
- Endocrinology
Background:
- Altered pain perception is observed in individuals with eating disorders.
- The role of endogenous opioid systems in this altered perception remains unclear.
Purpose of the Study:
- To investigate heat pain thresholds in patients with anorexia nervosa and bulimia nervosa.
- To explore the involvement of opioid and non-opioid mechanisms in pain perception differences.
Main Methods:
- Heat pain thresholds were assessed using phasic and tonic stimuli.
- Naloxone administration was used to probe opioid receptor involvement.
- Plasma cortisol, beta-hydroxybutyric acid, and triiodothyronine levels were measured.
Main Results:
- Bulimic patients and some anorectic patients showed elevated basal heat pain thresholds.
- Naloxone did not significantly alter pain thresholds, indicating a non-opioid mechanism.
- No correlation was found between pain thresholds and cortisol, beta-hydroxybutyric acid, or triiodothyronine levels.
Conclusions:
- Elevated heat pain thresholds in eating disorders are likely mediated by non-opioid pathways.
- Opioid systems do not appear to be the primary drivers of altered pain sensitivity in these patients.
- Further research is needed to elucidate the specific non-opioid mechanisms involved.