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Related Concept Videos

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.
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:
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...
Substance Use Disorders Affecting Sleep01:24

Substance Use Disorders Affecting Sleep

Substance use disorders involve a pattern of using drugs more extensively than intended and continuing use despite harmful consequences. This includes legal substances like alcohol and nicotine, as well as illegal drugs. These disorders often involve both physical and psychological dependence, reflecting compulsive use of substances that significantly alter thoughts, feelings, and behaviors, contributing to a major public health issue.
Understanding the concepts of physical dependence,...
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...
Sleep Apnea01:21

Sleep Apnea

Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...

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Narcolepsy in adolescents.

Shannon S Sullivan1

  • 1Stanford University School of Medicine, Stanford Sleep Disorders Clinic, 450 Broadway, M/C 5704, Redwood City, CA 94063, USA. shannon.s.sullivan@stanford.edu

Adolescent Medicine: State of the Art Reviews
|February 10, 2011
PubMed
Summary
This summary is machine-generated.

Narcolepsy, a childhood disorder often diagnosed late, involves disrupted sleep-wake boundaries. Research suggests autoimmune destruction of hypocretin neurons causes this condition, with no current cure but promising future therapies.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Immunology

Background:

  • Narcolepsy is a chronic neurological disorder affecting approximately 0.05% of the population, often starting in childhood or adolescence but frequently diagnosed much later.
  • Key symptoms include excessive daytime somnolence, cataplexy, sleep paralysis, and hypnagogic hallucinations, blurring the lines between wakefulness and sleep.
  • The disorder is strongly associated with the genetic marker HLA DQB1*0602 and recent findings point to autoimmune destruction of hypocretin-producing neurons.

Purpose of the Study:

  • To review the current understanding of narcolepsy, including its presentation, pathophysiology, diagnosis, and management.
  • To highlight the delayed diagnosis often experienced by patients and the impact on their quality of life.
  • To discuss emerging therapeutic strategies and the differential diagnosis for narcolepsy.

Main Methods:

  • Literature review of narcolepsy research, focusing on recent findings in genetics, neurobiology, and clinical presentation.
  • Analysis of diagnostic criteria and challenges, including the typical delay from symptom onset to diagnosis.
  • Examination of current and proposed treatment modalities, encompassing behavioral, pharmacological, and future immunomodulatory approaches.

Main Results:

  • Narcolepsy often begins in childhood/adolescence but has a diagnostic delay of approximately ten years.
  • Low cerebrospinal fluid (CSF) hypocretin levels are a key biomarker, supporting the autoimmune hypothesis.
  • Effective management involves behavioral changes, medications for sleepiness and cataplexy, and addressing co-occurring conditions.

Conclusions:

  • Narcolepsy is an autoimmune disorder characterized by hypocretin deficiency, with significant diagnostic delays impacting patients.
  • While no cure exists, current therapies manage symptoms, and future treatments like immunomodulators and hypocretin replacement show promise.
  • Accurate diagnosis and management are crucial, requiring consideration of differential diagnoses presenting with excessive daytime sleepiness.