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Related Experiment Videos

Adenosine stimulation, ventilation, and arousal from sleep.

K Gleeson1, C W Zwillich

  • 1Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Pennsylvania 17033.

The American Review of Respiratory Disease
|February 1, 1992
PubMed
Summary

Respiratory stimuli like adenosine and hypercapnia cause arousal from sleep by increasing ventilation. The study found that the minute ventilation preceding arousal was similar for both stimuli, supporting the hypothesis that rising ventilation drives arousal.

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Area of Science:

  • Respiratory Physiology
  • Sleep Science
  • Neuroscience

Background:

  • The precise mechanisms by which respiratory stimuli trigger arousal from sleep remain incompletely understood.
  • Existing hypotheses suggest that an increase in ventilation during sleep may be the primary driver for arousal.
  • Investigating this link is crucial for understanding sleep regulation and respiratory control.

Purpose of the Study:

  • To test the hypothesis that arousal from sleep is induced by an increase in ventilation.
  • To compare the minute ventilation at the point of arousal when stimulated by adenosine versus hypercapnia.
  • To determine if the stimulus type influences the ventilation level required for arousal.

Main Methods:

  • Utilized full-night polysomnography in five healthy young men, monitoring EEG, EMG, end-tidal CO2, and inspired minute ventilation (VI).

Related Experiment Videos

  • Introduced respiratory stimulation using intravenous adenosine infusion and progressive hyperoxic hypercapnia.
  • Compared minute ventilation preceding arousal during stimulated (adenosine, hypercapnia) and spontaneous arousals.

    • Main Results:

    • Minute ventilation immediately preceding arousal was similar during adenosine stimulation (13.0 L/min) and hypercapnic stimulation (12.9 L/min).
    • This ventilation level at arousal was significantly higher than that preceding spontaneous arousals (8.2 L/min).
    • A strong within-subject correlation (R=0.96) was observed between ventilation levels preceding arousal from different stimuli.

    Conclusions:

    • The findings support the hypothesis that increased ventilation, irrespective of the specific respiratory stimulus, is a key factor inducing arousal from sleep.
    • This suggests a common pathway where rising respiratory drive leads to awakening.
    • The study highlights the role of ventilatory changes in sleep-wake transitions during respiratory challenges.