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Related Experiment Videos

Interactions between volitional and automatic breathing during respiratory apraxia.

Philippe Haouzi1, Bruno Chenuel, Gerard Barroche

  • 1Laboratoire de Physiologie, Faculté de Médecine de Nancy, Service d'Exploration Fonctionnelle Respiratoire, Vandoeuvre-lès-Nancy, France. p.haouzi@chu-nancy.fr

Respiratory Physiology & Neurobiology
|September 28, 2005
PubMed
Summary
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This study on progressive supranuclear palsy reveals that voluntary breathing acts can inhibit automatic breathing. Even with impaired volitional control, breathing interactions offer insights into respiratory regulation.

Area of Science:

  • Neuroscience
  • Respiratory Physiology

Background:

  • Investigating the interplay between voluntary and automatic respiratory control is crucial for understanding breathing mechanisms.
  • Progressive supranuclear palsy (PSP) offers a unique model to study these interactions due to its effects on motor control.

Observation:

  • A patient with advanced PSP showed significantly impaired voluntary breathing control but heightened automatic respiration.
  • Voluntary inspiratory efforts in the patient were slow and limited to spontaneous tidal volume.
  • Automatic breathing movements persisted during voluntary efforts, decreasing in amplitude as voluntary activity peaked.

Findings:

  • Voluntary breathing acts appear to inhibit automatic respiratory activity, suggesting a strong interaction.
  • Breath-holding in the patient reduced both amplitude and frequency of spontaneous breathing, indicating medullary-level inhibition.

Related Experiment Videos

  • The findings suggest that cortical and sub-cortical structures involved in planning, not just the primary motor cortex, mediate the suppression of automatic breathing during voluntary acts.

    • Implications:

    • This research sheds light on the neural control of respiration and the complex relationship between volitional and automatic breathing patterns.
    • Understanding these interactions in neurodegenerative diseases like PSP can inform therapeutic strategies for respiratory dysfunction.