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Related Experiment Videos

[Yawning: from birth to senescence].

Olivier Walusinski1

  • 1Médecine générale, Brou.

Psychologie & Neuropsychiatrie Du Vieillissement
|March 25, 2006
PubMed
Summary

Yawning, a behavior influenced by dopamine and acetylcholine, shows a strong link with REM sleep. Its frequency changes with age, decreasing in the elderly, mirroring REM sleep patterns.

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Area of Science:

  • Neuroscience
  • Ethology
  • Developmental Biology

Context:

  • Yawning is a complex motor act influenced by neurotransmitters like dopamine and acetylcholine.
  • It exhibits conserved morphology across vertebrates, suggesting ancient evolutionary origins.
  • Yawning frequency changes throughout the lifespan, notably decreasing in the elderly.

Purpose:

  • To explore the neurobiological underpinnings of yawning.
  • To investigate the evolutionary and developmental aspects of yawning.
  • To establish a potential link between yawning and sleep, particularly REM sleep.

Summary:

  • Yawning is modulated by dopamine, oxytocin, and acetylcholine, with dopaminergic activity potentially declining with age.
  • Morphologically similar across species, yawning appears early in human development and persists.
  • A parallel evolution in yawn frequency and REM sleep duration suggests a significant connection.

Impact:

  • Highlights the neurochemical pathways involved in yawning.
  • Provides insights into the evolutionary conservation and developmental trajectory of yawning.
  • Establishes a novel link between yawning and REM sleep, opening avenues for further research in sleep and aging.

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