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Related Concept Videos

REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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...
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
NREM sleep comprises four progressive stages that seamlessly merge:
Stages of Sleep01:22

Stages of Sleep

Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Narcolepsy01:07

Narcolepsy

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.
Management of Insomnia01:19

Management of Insomnia

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...
Sleepwalking and Sleep Talking01:17

Sleepwalking and Sleep Talking

Somnambulism, commonly known as sleepwalking, involves individuals engaging in activities ranging from simple walking to more complex behaviors such as driving. Sleepwalking typically occurs during the slow-wave sleep stages 3 and 4 early in the night when the person is not dreaming, contradicting the myth that sleepwalkers are acting out their dreams.
Factors that increase the likelihood of sleepwalking include sleep deprivation and alcohol consumption. Contrary to common beliefs, it is safe...

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Related Experiment Video

Updated: May 24, 2026

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice
06:23

A Chronic Sleep Fragmentation Model using Vibrating Orbital Rotor to Induce Cognitive Deficit and Anxiety-Like Behavior in Young Wild-Type Mice

Published on: September 22, 2020

Cyclic alternating pattern analysis in REM sleep behavior disorder.

Ayşe Kutlu1, Pervin Işeri, Macit Selekler

  • 1Department of Neurology, Kocaeli University, Kocaeli, Turkey. draysekutlu@yahoo.com

Sleep & Breathing = Schlaf & Atmung
|February 28, 2012
PubMed
Summary
This summary is machine-generated.

Cyclic alternating pattern (CAP) analysis revealed increased arousal instability in non-rapid eye movement (NREM) sleep for patients with REM sleep behavior disorder (RBD). This suggests NREM sleep disturbances may contribute to RBD pathogenesis.

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Area of Science:

  • Sleep Medicine
  • Neurology
  • Neurophysiology

Background:

  • Rapid eye movement (REM) sleep behavior disorder (RBD) is a parasomnia characterized by complex motor behaviors during REM sleep.
  • The underlying mechanisms and potential NREM sleep disturbances in RBD remain incompletely understood.

Purpose of the Study:

  • To investigate cyclic alternating pattern (CAP) expression in NREM sleep among patients with idiopathic RBD.
  • To evaluate arousal instability in NREM sleep as a potential indicator of RBD pathophysiology.

Main Methods:

  • Polysomnography was conducted on 31 idiopathic RBD patients and 21 age/gender-matched controls.
  • Conventional sleep parameters and CAP metrics were compared between the RBD and control groups.
  • Correlations between disease duration, age, and CAP parameters were analyzed.

Main Results:

  • RBD patients exhibited significantly higher CAP cycles, CAP sequences, CAP index, and CAP rate compared to controls.
  • Increased CAP sequences were associated with A2 and A3 subtypes, while A1 subtype was lower in RBD patients.
  • Disease duration positively correlated with total CAP time and A3 index; age negatively correlated with A1 index.

Conclusions:

  • This study is the first to evaluate CAP parameters in idiopathic RBD using polysomnography.
  • Elevated CAP rates suggest that NREM sleep is also affected in RBD patients.
  • CAP analysis may offer valuable insights into the pathogenesis of REM sleep behavior disorder and other parasomnias.