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Use of a Psychophysiological Script-driven Imagery Experiment to Study Trauma-related Dissociation in Borderline Personality Disorder
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Distorted symptom perception in patients with medically unexplained symptoms.

Katleen Bogaerts1, Lien Van Eylen, Wan Li

  • 1Department of Psychology, University of Leuven, Leuven, Belgium. katleen.bogaerts@psy.kuleuven.be

Journal of Abnormal Psychology
|February 10, 2010
PubMed
Summary

Patients with medically unexplained symptoms (MUS) show altered symptom perception, with less connection between perceived breathlessness and physiological changes compared to healthy individuals. This indicates a greater influence of psychological factors in MUS symptom experience.

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Area of Science:

  • Psychosomatic Medicine
  • Respiratory Physiology
  • Clinical Psychology

Background:

  • Medically Unexplained Symptoms (MUS) represent a significant clinical challenge.
  • Understanding symptom perception is crucial for diagnosing and managing MUS.
  • The interplay between physiological signals and psychological factors in MUS requires further investigation.

Purpose of the Study:

  • To compare symptom perception, specifically dyspnea, between patients with MUS and healthy controls.
  • To investigate the relationship between perceived dyspnea and objective physiological respiratory parameters in both groups.
  • To explore the role of top-down psychological processes in MUS symptom perception.

Main Methods:

  • Employed a rebreathing paradigm to induce varying levels of respiratory load and dyspnea.
  • Monitored breathing behavior and collected subjective dyspnea ratings.
  • Calculated within-subject correlations between dyspnea intensity and physiological measures (end-tidal CO2, minute ventilation).

Main Results:

  • Patients with MUS exhibited weaker correlations between perceived dyspnea and physiological respiratory changes compared to healthy controls.
  • This dissociation was particularly evident under conditions of weaker afferent physiological input.
  • Healthy individuals demonstrated a stronger link between subjective breathlessness and objective respiratory parameters.

Conclusions:

  • The findings suggest that psychological factors play a more prominent role in symptom perception for individuals with MUS.
  • Altered sensory processing or heightened top-down modulation may contribute to the experience of symptoms in MUS.
  • Further research into the neurobiological and psychological mechanisms underlying symptom perception in MUS is warranted.