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[Dyspnea and behavioral control].

T Chonan1

  • 1First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan.

Nihon Kyobu Shikkan Gakkai Zasshi
|April 1, 1992
PubMed
Summary
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Voluntary breathing control influences respiratory sensations and dyspnea. Behavioral regulation of breathing appears to minimize discomfort, aiding in maintaining homeostasis.

Area of Science:

  • Respiratory Physiology
  • Neuroscience
  • Behavioral Regulation

Background:

  • Respiration is primarily regulated automatically by chemoreceptors and mechanoreceptors.
  • Voluntary control of breathing also plays a role, influenced by behavioral factors.

Purpose of the Study:

  • To investigate the impact of voluntary breathing control on respiratory sensations and dyspnea.
  • To explore the hypothesis that breathing is behaviorally regulated to minimize dyspnea.

Main Methods:

  • Analysis of respiratory sensations and dyspnea under voluntary increases and constraints of ventilation.
  • Comparison of sensory intensity during voluntary hyperventilation, exercise-induced hyperventilation, hypercapnia, hypoxia, and isocapnic hyperoxia.
  • Examination of breathing patterns and levels under constant chemical stimuli.

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Main Results:

  • Voluntary increases in ventilation intensify dyspnea, comparable to exercise but less than hypercapnia or hypoxia.
  • Voluntary constraint of ventilation proportionally increases dyspnea and is perceived as more uncomfortable than hyperventilation.
  • Respiratory sensations and dyspnea intensity are minimized near spontaneous breathing levels.

Conclusions:

  • Breathing is, in part, behaviorally regulated to minimize dyspnea.
  • The behavioral control system for breathing contributes to maintaining body homeostasis by modulating respiratory output via respiratory sensations.