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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Sleep Medicine

Background:

  • Obstructive sleep apnea (OSA) is a prevalent sleep disorder associated with various cognitive deficits.
  • Episodic memory, crucial for daily functioning, may be particularly vulnerable to the effects of OSA.

Purpose of the Study:

  • To systematically evaluate episodic memory performance in individuals diagnosed with obstructive sleep apnea (OSA).
  • To synthesize existing research through meta-analysis to quantify the impact of OSA on different facets of episodic memory.

Main Methods:

  • A meta-analysis was conducted, synthesizing data from 42 studies.
  • Included 2,294 adults with untreated OSA and 1,364 healthy controls.
  • Episodic memory was assessed using measures of immediate recall, delayed recall, learning, and recognition.

Main Results:

  • Individuals with OSA demonstrated significant impairments in verbal episodic memory (immediate recall, delayed recall, learning, recognition) compared to healthy controls.
  • Visuo-spatial episodic memory also showed significant deficits in immediate and delayed recall for OSA patients.
  • No significant impairments were found in visual immediate recall or visuo-spatial learning when compared to controls.

Conclusions:

  • This meta-analysis confirms significant episodic memory deficits in individuals with obstructive sleep apnea.
  • The findings highlight the detrimental effect of OSA on both verbal and visuo-spatial memory functions.
  • These memory impairments associated with OSA have implications for daily life and functioning.