Development of fetal and neonatal sleep and circadian rhythms

  • M. M
  • Y.G.H. M
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The origin of sleep and circadian rhythms development is found during the fetal period. Both quiet (NREM) and active (REM) sleep are distinguishable during the last 10 weeks of gestation. Comparable to fetuses, low risk preterm infants recorded at 30-40 weeks postconceptional age, had a similar development of sleep i.e. an increase in quiet sleep and a decrease in indeterminate sleep. A further development in sleep organization characterized by increased slow wave and spindle activity during quiet sleep and coupling with circadian rhythm takes place during the first 6 months of life in both term and preterm infants. Circadian rhythm of fetal heart rate synchronized with maternal rest-activity, heart rate, cortisol, melatonin, and body temperature rhythms is present during the last 10 weeks of gestation. Although maternally influenced, circadian rhythm antenatally becomes ultradian at birth. Both preterm and term infants show a significant increase in circadian body temperature rhythm amplitude during the first 3 months of life. © 2003 Elsevier Science Ltd. All rights reserved.

Author-supplied keywords

  • *brain development
  • *circadian rhythm
  • *fetus
  • *newborn
  • *prematurity
  • *sleep
  • REM sleep
  • animal model
  • antidepressant agent/dt [Drug Therapy]
  • antihypertensive agent
  • arousal
  • behavior
  • body temperature
  • brain development
  • clomipramine/dt [Drug Therapy]
  • clonidine
  • depression/dt [Drug Therapy]
  • electrocardiography
  • electroencephalography
  • electromyography
  • electrooculography
  • fetus
  • fetus development
  • fetus heart rate
  • gestational age
  • heart rate
  • human
  • hydrocortisone
  • hydrocortisone/ec [Endogenous Compound]
  • infant
  • melatonin
  • melatonin/ec [Endogenous Compound]
  • nerve cell plasticity
  • newborn
  • nonREM sleep
  • nonhuman
  • postnatal development
  • pregnancy
  • prematurity
  • rat
  • review
  • rhythm
  • risk
  • sleep waking cycle

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  • Mirmiran M.

  • Maas Y.G.H.

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