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Related Concept Videos

Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Circadian Rhythms and Gene Regulation02:19

Circadian Rhythms and Gene Regulation

The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
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Management of Insomnia01:19

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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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Related Experiment Video

Updated: Jun 12, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

Circadian rhythm sleep disorders.

Naveen Kanathur1, John Harrington, Teofilo Lee-Chiong

  • 1Division of Sleep Medicine, Department of Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO 80206, USA.

Clinics in Chest Medicine
|May 22, 2010
PubMed
Summary
This summary is machine-generated.

Biological processes exhibit rhythmicity due to cellular energy limitations. Mismatches between internal circadian rhythms and external schedules can cause circadian rhythm sleep disorders, requiring careful monitoring and treatment.

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Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings
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Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings

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Related Experiment Videos

Last Updated: Jun 12, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings
06:39

Through-the-Wall Blood Sampling Method to Minimize Sleep Disruption in Clinical Settings

Published on: June 13, 2025

Area of Science:

  • Chronobiology
  • Sleep Medicine
  • Neuroscience

Background:

  • All biological processes exhibit inherent rhythmicity due to cellular energy constraints.
  • Optimal sleep and wakefulness depend on synchronizing sleep-wake schedules with circadian rhythm-related alertness periods.
  • Disruptions in this alignment can lead to circadian rhythm sleep disorders.

Purpose of the Study:

  • To discuss disorders of the circadian sleep-wake cycle.
  • To outline therapeutic measures for correcting these disorders.

Main Methods:

  • Evaluation involves monitoring sleep diaries over several days to weeks.
  • Assessment of the mismatch between endogenous circadian rhythms and environmental sleep-wake schedules.

Main Results:

  • Persistent or recurrent mismatch is identified as the cause of circadian rhythm sleep disorders.
  • The article focuses on the discussion and correction of these disorders.

Conclusions:

  • Circadian rhythm sleep disorders arise from a misalignment between the body's internal clock and external demands.
  • Effective management requires accurate diagnosis through sleep monitoring and appropriate therapeutic interventions.