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Quantifying Infra-slow Dynamics of Spectral Power and Heart Rate in Sleeping Mice
10:56

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Published on: August 2, 2017

Cyclic alternating pattern sequences and non-cyclic alternating pattern periods in human sleep.

Arianna Smerieri1, Liborio Parrino, Matteo Agosti

  • 1Sleep Disorders Center, Department of Neuroscience, University of Parma, Italy.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|August 22, 2007
PubMed
Summary
This summary is machine-generated.

The duration of Continuing Arousal Provision (CAP) sequences in sleep is determined by the number of CAP cycles, not their individual length. This suggests CAP cycles are key modules shaping sleep structure.

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Area of Science:

  • Sleep Science
  • Neurophysiology

Background:

  • The Continuing Arousal Provision (CAP) cycle involves alternating phases of activation (A) and inhibition (B).
  • CAP sequences are recurring patterns observed during sleep.

Purpose of the Study:

  • To test if CAP sequence duration is primarily influenced by the number or length of individual CAP cycles.
  • To investigate the relationship between CAP cycle characteristics and overall CAP sequence duration.

Main Methods:

  • Analysis of polysomnographic recordings from 24 healthy adults (ages 20-35).
  • Quantification of CAP sequences and CAP cycles per night.
  • Correlation analysis between CAP cycle duration, subtype A1, and CAP sequence length.

Main Results:

  • 1053 CAP sequences were identified, averaging 43.9 per night.
  • Mean CAP sequence duration was 2 minutes 33 seconds, with each sequence containing an average of 5.6 CAP cycles.
  • CAP cycles, particularly subtype A1, showed a strong correlation with CAP sequence length (r=0.92, p<0.0001).

Conclusions:

  • CAP sequence length increases with the accumulation of CAP cycles.
  • CAP cycles act as time-constant modules that dynamically regulate sleep structure.