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Related Concept Videos

Restless Leg Syndrome and Night Terrors01:27

Restless Leg Syndrome and Night Terrors

144
Restless Leg Syndrome (RLS), also known as Willis-Ekbom disease, is a neurological disorder characterized by an uncontrollable urge to move the legs due to uncomfortable sensations. These sensations typically occur during periods of rest or inactivity, particularly when lying down or sitting, and can severely disrupt sleep.
The exact cause of RLS is not fully understood, but it is believed to involve dopamine, a neurotransmitter that helps regulate muscle movement. Imbalances in dopamine levels...
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REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
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Sleep-Wake Cycles01:24

Sleep-Wake Cycles

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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
NREM sleep comprises four progressive stages that seamlessly merge:
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Circadian Rhythms and Gene Regulation02:19

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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...
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Management of Insomnia01:19

Management of Insomnia

229
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...
229
Narcolepsy01:07

Narcolepsy

89
Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Related Experiment Video

Updated: May 30, 2025

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
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Circadian pattern in restless legs syndrome.

Ambra Stefani1

  • 1Department of Neurology, Medical University Innsbruck, Innsbruck, Austria.

Handbook of Clinical Neurology
|January 26, 2025
PubMed
Summary

Restless Legs Syndrome (RLS) symptoms significantly worsen in the evening and night, a distinct circadian pattern. This pattern is influenced by dopamine, iron, and genetics, aiding RLS diagnosis.

Area of Science:

  • Neurology
  • Sleep Medicine
  • Chronobiology

Background:

  • Restless Legs Syndrome (RLS) is characterized by a distinct circadian pattern in symptom severity.
  • Symptoms typically worsen in the evening and at night, improving in the early morning.
  • This temporal pattern is a key diagnostic criterion for RLS.

Purpose of the Study:

  • To provide an overview of the circadian pattern in Restless Legs Syndrome (RLS).
  • To explore the diagnostic significance of RLS symptom timing.
  • To review the underlying mechanisms and related physiological changes in RLS circadian variations.

Main Methods:

  • Review of clinical studies and diagnostic criteria for RLS.
  • Analysis of factors contributing to circadian fluctuations in RLS.
Keywords:
Circadian variationDopaminePLMPeriodic leg movementsRLSSIT

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  • Examination of research on sensory processing, spinal, and cortical excitability in RLS.

    • Main Results:

    • RLS symptoms exhibit a clear circadian variation, peaking in the evening/night and improving in the morning.
    • The circadian pattern is independent of symptom worsening at rest.
    • Implicated mechanisms include dopamine, iron, opioids, and genetic factors.

    Conclusions:

    • The circadian pattern is a fundamental characteristic of RLS, crucial for diagnosis.
    • Understanding these circadian fluctuations offers insights into RLS pathophysiology.
    • Further research into sensory processing, excitability, and network function in RLS is warranted.