Research

Hormonal

Chronic insomnia combined with objectively measured short sleep duration (<6 hours) causes significant deficits in neuropsychological performance, specifically in processing speed, set-switching attention, and visual memory.

If you have chronic insomnia, your cognitive performance is likely normal unless your actual sleep time is short (less than 6 hours). The key to protecting your brain function is not just treating the insomnia complaint, but ensuring you get sufficient objective sleep duration. Focus on increasing total sleep time to mitigate cognitive deficits.

GoodQualifiesHIGH confidence
Insomnia with objective short sleep duration is associated with deficits in neuropsychological performance... poorer neuropsychological performance in variables such as processing speed, set-switching attention, and number of visual memory errors and omissions.
Julio Fernández‐Mendoza et al. · SLEEP · 2010

Why this rating

Large, population-based cross-sectional study with rigorous controls for confounders, though causality is limited by cross-sectional design.

Source

Insomnia with Objective Short Sleep Duration is Associated with Deficits in Neuropsychological Performance: A General Population Study

Julio Fernández‐Mendoza et al. · SLEEP · 2010

DOI 10.1093/sleep/33.4.459

cross_sectional · n=1405Cited 252×
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DOI resolved against Crossref · corpus check 2026-06-10

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