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Relationship between enteric migrating motor complex and the sleep cycle.

D Kumar1, C Idzikowski, D L Wingate

  • 1Gastrointestinal Science Research Unit, London Hospital Medical College, United Kingdom.

The American Journal of Physiology
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

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The study found that gut motility cycles (MMC) are influenced by sleep but remain independent of sleep cycles, including rapid eye movement (REM) sleep. This suggests separate regulation of these major biorhythms.

Area of Science:

  • Gastroenterology
  • Sleep Medicine
  • Chronobiology

Background:

  • The relationship between the gut's migrating motor complex (MMC) cycle and the brain's sleep-wake cycle, specifically rapid eye movement (REM) and non-REM sleep, is not fully understood.
  • Investigating potential synchrony or independence between these two major biological rhythms is crucial for understanding gastrointestinal and sleep physiology.

Purpose of the Study:

  • To investigate the synchrony between the enteric migrating motor complex (MMC) cycle and the cortical sleep cycle (REM/non-REM).
  • To determine if the MMC cycle is modulated by sleep presence/absence and if it is contingent upon the sleep cycle.

Main Methods:

  • Six healthy subjects underwent continuous monitoring of upper small bowel motor activity and sleep stages during both nocturnal and diurnal (reversed) sleep.

Related Experiment Videos

  • Motility was measured using a nasojejunal probe with microtransducers; sleep stages were recorded in a sleep laboratory.
  • Sleep was artificially reversed for diurnal studies by advancing bedtime by 4 hours for three consecutive nights.

    • Main Results:

    • Diurnal (reversed) sleep showed a significantly higher number of REM episodes and REM sleep stage shifts compared to nocturnal sleep.
    • During both diurnal and nocturnal sleep, a significant reduction in MMC cycle length and the duration of MMC phase II was observed.
    • The distribution of MMCs across different sleep stages, including REM sleep, appeared random.

    Conclusions:

    • Periodic gut activity (MMC cycle) is modulated by the presence or absence of sleep.
    • The data support the hypothesis that the MMC cycle and sleep cycle are independent biological rhythms.
    • Neither biorhythm appears to be contingent upon the other, suggesting distinct regulatory mechanisms.