Sleep development in children with congenital and acquired hypothyroidism

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M Hayashi1, S Araki, J Kohyama

  • 1Department of Pediatrics, Tokyo Medical and Dental University, Japan.

Brain & Development
|January 1, 1997
PubMed

Insights

Congenital hypothyroidism, or thyroid hormone deficiency before birth, can impact early central nervous system development, specifically affecting REM sleep and body movements during sleep in infants.

Area of Science:

  • Neuroscience
  • Endocrinology
  • Developmental Pediatrics

Background:

  • Thyroid hormones are crucial for normal central nervous system (CNS) development.
  • Congenital hypothyroidism (CH) is a condition of insufficient thyroid hormone production from birth.
  • The impact of prenatal thyroid hormone deficiency on early sleep development is not fully understood.

Purpose of the Study:

  • To investigate the influence of congenital hypothyroidism on the sleep development of the human central nervous system.
  • To assess specific sleep parameters in infants and children diagnosed with CH.

Main Methods:

  • Utilized all-night polysomnography to examine sleep development in children with CH.
  • Compared sleep patterns, including REM sleep and body movements, between CH patients and controls.
  • Analyzed data from patients with varying durations of thyroxine replacement therapy.

Main Results:

  • While the sleep-wakefulness circadian rhythm was generally unaffected, mild decreases in REM sleep were observed in younger CH patients.
  • One patient with delayed thyroxine replacement showed significantly reduced rapid eye movements during REM sleep.
  • Generalized gross body movements during sleep were more frequently disturbed in CH patients and remained reduced even after L-thyroxine treatment.

Conclusions:

  • Congenital hypothyroidism can lead to specific abnormalities in sleep development, particularly affecting REM sleep and gross motor activity.
  • Sleep development patterns in CH patients may serve as an indicator for evaluating regional brain impairment.
  • Acquired hypothyroidism and transient hyperthyrotropinemia did not present with similar severe sleep abnormalities.

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