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Related Concept Videos

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).
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Narcolepsy01:07

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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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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.
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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...
REM Sleep Behavior Disorder01:15

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Obstructive sleep apnea in narcolepsy.

Gemma Sansa1, Alex Iranzo, Joan Santamaria

  • 1Neurology Service, Hospital Clínic, Institut d'Investigació Biomèdiques August Pi i Sunyer (IDIBAPS), and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain.

Sleep Medicine
|August 25, 2009
PubMed
Summary
This summary is machine-generated.

Obstructive sleep apnea (OSA) is common in narcolepsy patients, often delaying diagnosis and complicating management. Continuous positive airway pressure (CPAP) therapy may not resolve excessive daytime sleepiness (EDS) in these individuals.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Pulmonology

Background:

  • Narcolepsy and obstructive sleep apnea syndrome (OSAS) are distinct conditions causing excessive daytime sleepiness (EDS).
  • The coexistence of narcolepsy and OSAS is recognized, but its prevalence and clinical impact remain unclear.
  • Obstructive sleep apnea (OSA) can mask or mimic narcolepsy symptoms, potentially delaying diagnosis.

Purpose of the Study:

  • To determine the prevalence of obstructive sleep apnea (OSA) in patients diagnosed with narcolepsy.
  • To investigate the clinical significance of coexisting OSA in narcolepsy patients.

Main Methods:

  • A cohort of 133 narcolepsy patients diagnosed via polysomnography and multiple sleep latency testing was studied.
  • Patients underwent systematic interviews assessing narcolepsy and OSAS features and response to CPAP.
  • Prevalence of OSA was determined using the apnea-hypopnea index (AHI).

Main Results:

  • 24.8% of narcolepsy patients had an AHI > 10, indicating moderate to severe OSA.
  • Diagnosis of narcolepsy was delayed by an average of 6.1 years in 10 patients initially diagnosed solely with OSAS.
  • OSA in narcolepsy was associated with male gender, older age, and higher BMI; CPAP improved EDS in only a minority of cases.

Conclusions:

  • Obstructive sleep apnea (OSA) is prevalent in narcolepsy and can significantly delay diagnosis and treatment.
  • Active screening for cataplexy is crucial in OSA patients to rule out narcolepsy.
  • CPAP therapy is often insufficient for managing EDS in narcolepsy patients with coexisting OSA.