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[Dyspnea and respiratory reflexes].

I Homma1, A Kanamaru, M Sibuya

  • 1Department of Physiology, Showa University School of Medicine, Tokyo, Japan.

Nihon Kyobu Shikkan Gakkai Zasshi
|April 1, 1992
PubMed
Summary

Intercostal muscle afferents project to the brain, potentially influencing respiratory sensations like dyspnea. Stimulating these afferents may offer a novel approach to reducing breathlessness.

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Area of Science:

  • Neuroscience
  • Respiratory Physiology

Context:

  • Dyspnea (shortness of breath) is a complex sensation.
  • The role of intercostal muscle afferents in dyspnea is not fully understood.

Purpose:

  • To investigate the projection of intercostal muscle spindle afferents to the cerebral cortex.
  • To explore the potential role of these afferents in respiratory sensation and dyspnea.

Summary:

  • Tapping lower intercostal muscles evoked an H reflex and cortical evoked potentials (N1 latency: 19.8 ms), indicating afferent projection to the brain.
  • Vibration of intercostal muscles induced later cortical potentials (250 ms), suggesting a role in respiratory sensation.
  • Findings support the hypothesis that intercostal muscle afferents contribute to respiratory sensation and may be modulated to reduce dyspnea.

Impact:

  • Provides evidence for the neural pathways involved in respiratory sensation.
  • Suggests potential therapeutic strategies for dyspnea by targeting intercostal muscle afferents.

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