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Related Concept Videos

Sleep Apnea01:21

Sleep Apnea

775
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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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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Related Experiment Video

Updated: Apr 6, 2026

Drug-Induced Sleep Endoscopy DISE with Target Controlled Infusion TCI and Bispectral Analysis in Obstructive Sleep Apnea
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Optic Nerve Dysfunction in Obstructive Sleep Apnea: An Electrophysiological Study.

Claudio Liguori1, Maria Giuseppina Palmieri1, Mariangela Pierantozzi2

  • 1Sleep Medicine Centre, Neurophysiopathology Unit, Department of Systems Medicine, University of Rome 'Tor Vergata', Rome, Italy.

Sleep
|August 4, 2015
PubMed
Summary
This summary is machine-generated.

Patients with obstructive sleep apnea (OSA) show impaired visual system function, specifically in visual evoked potentials (VEP), indicating potential optic nerve damage. This study highlights a link between OSA and vision problems, even without other health issues.

Keywords:
ERGOSAVEPoptic nervevisual system

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Area of Science:

  • Ophthalmology
  • Neurology
  • Sleep Medicine

Background:

  • Obstructive sleep apnea (OSA) is a common condition linked to various health issues.
  • The impact of OSA on the visual system, particularly the optic nerve, is not fully understood.

Purpose of the Study:

  • To evaluate the visual system integrity in patients with severe OSA using electroretinogram (ERG) and visual evoked potential (VEP).
  • To compare electrophysiological findings in OSA patients with those in healthy controls.

Main Methods:

  • Electrophysiological studies (ERG and VEP) were conducted on severe OSA patients and age/sex/BMI-matched healthy controls.
  • Stimulation involved reversal patterns at low and high spatial frequencies.
  • Visual impairment and systemic disorders were excluded in participants.

Main Results:

  • OSA patients exhibited significantly longer P100 wave latency and reduced amplitude in VEP compared to controls.
  • No significant differences in ERG components were observed between the groups.
  • No correlations were found between OSA severity, sleepiness scores, and electrophysiological findings.

Conclusions:

  • Patients with OSA demonstrate altered VEPs, suggesting optic nerve dysfunction.
  • Hypoxia and hypercarbia associated with OSA may contribute to optic nerve impairment.
  • OSA itself may negatively impact optic nerve function, independent of other comorbidities.