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The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
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Attention-deficit/hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by persistent inattention, hyperactivity, and impulsivity. It affects approximately 5-8% of children globally, with around 60-70% of cases persisting into adulthood. ADHD has significant implications for educational attainment, social interactions, and occupational success.
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Related Experiment Video

Updated: Jul 10, 2025

Human Primary Trophoblast Cell Culture Model to Study the Protective Effects of Melatonin Against Hypoxia/reoxygenation-induced Disruption
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Melatonin in Neurodevelopmental Disorders: A Critical Literature Review.

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Melatonin

Keywords:
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Area of Science:

  • Neuroscience
  • Endocrinology
  • Genetics

Background:

  • Melatonin, a hormone regulating sleep-wake cycles, has antioxidant and neuroprotective properties.
  • Neurodevelopmental disorders (NDDs) encompass a range of conditions affecting brain development.
  • Altered melatonin production and circadian rhythms are implicated in various NDDs.

Purpose of the Study:

  • To review the relationship between melatonin and NDDs.
  • To explore melatonin's role in typical and atypical neurodevelopment.
  • To discuss the impact of melatonin dysfunction on NDD pathophysiology and symptoms.

Main Methods:

  • Literature review of studies on melatonin, circadian rhythms, and NDDs.
  • Analysis of physiological effects of melatonin, including antioxidant properties.
  • Examination of specific NDDs (e.g., autism spectrum disorder, bipolar disorder, schizophrenia) in relation to melatonin.

Main Results:

  • Melatonin's antioxidant and physiological roles are crucial for neurodevelopment.
  • Impaired melatonin production and circadian disruption are linked to numerous NDDs.
  • Overlapping symptoms in NDDs may be associated with abnormal melatonin signaling.

Conclusions:

  • Melatonin plays a significant role in neurodevelopment and its disruption contributes to NDDs.
  • Circadian rhythm disturbances, particularly sleep-wake cycles, are key factors in NDDs.
  • Targeting melatonin pathways may offer therapeutic potential for NDDs.