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Neuropsychological function in obstructive sleep apnoea.

H Engleman1, D Joffe

  • 1Respiratory Medicine Unit, Department of Medicine, University of Edinburgh, UK. h.engleman@ed.ac.uk

Sleep Medicine Reviews
|August 18, 2004
PubMed
Summary

Obstructive sleep apnoea (OSA) causes significant daytime sleepiness and cognitive deficits, increasing accident risk. Continuous positive airway pressure (CPAP) therapy improves these symptoms, but full recovery is not always achieved.

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Area of Science:

  • Neuroscience
  • Sleep Medicine
  • Psychology

Background:

  • Obstructive sleep apnoea (OSA) is linked to neuropsychological deficits.
  • These deficits include daytime sleepiness, cognitive impairment, reduced driving ability, and psychosocial issues.

Purpose of the Study:

  • To review the neuropsychological deficits in OSA patients.
  • To explore the impact of these deficits on daily life.
  • To discuss the effectiveness of CPAP therapy.

Main Methods:

  • Review of case-control studies and clinical evidence.
  • Assessment of polysomnography and self-rating scales for sleepiness.
  • Evaluation of cognitive tests for attention, memory, and executive function.

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Main Results:

  • OSA patients exhibit moderate to severe daytime sleepiness.
  • Mild to moderate impairments are observed in attention, executive function, and memory.
  • Road traffic accident rates are 2-7 times higher in OSA patients.
  • CPAP therapy improves but may not fully normalize sleepiness and cognitive function.

Conclusions:

  • Nocturnal events in OSA, like arousals and hypoxemia, contribute to neuropsychological deficits.
  • Sleepiness and cognitive decline are key issues in OSA.
  • CPAP offers benefits, yet residual deficits warrant further investigation.