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Central respiratory oscillator: phase-response analysis.

S Kitano1, A Komatsu

  • 1Department of Physiology, Tokyo Women's Medical College, Japan.

Brain Research
|January 26, 1988
PubMed
Summary
This summary is machine-generated.

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Investigating the respiratory oscillator in rabbits revealed distinct phase shifts during breathing cycles. Electrical stimulation showed that expiration-to-inspiration switching differs from inspiration-to-expiration switching.

Area of Science:

  • Neuroscience
  • Respiratory Physiology

Background:

  • The central respiratory oscillator controls breathing patterns.
  • Understanding its properties is crucial for respiratory control research.

Purpose of the Study:

  • To analyze phrenic nerve activity using phase-response curves (PRCs) in rabbits.
  • To investigate the effects of electrical stimulation on the respiratory oscillator.

Main Methods:

  • Electrical stimulation of the middle external intercostal nerve in rabbits.
  • Analysis of phrenic nerve activity and phase-response curves (PRCs).

Main Results:

  • Stimuli during inspiration caused all-or-none phase advances.
  • Stimuli during expiration caused graded phase delays.

Related Experiment Videos

  • A discontinuous PRC at expiration-to-inspiration transition suggests differing switching mechanisms.

    • Conclusions:

    • Expiration-to-inspiration switching differs in nature from inspiration-to-expiration switching.
    • Endogenous bursting neurons may play a role in the mammalian central respiratory oscillator.