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Home - Medicine - Sleep Apnea’s Early Mark on the Brain

Medicine

Sleep Apnea’s Early Mark on the Brain

Last updated: February 22, 2026 12:12 pm
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Sleep Apnea’s Early Mark on the Brain

A study using 18F-fluorodeoxyglucose PET imaging compared brain glucose metabolism in 30 cognitively normal patients with moderate-to-severe obstructive sleep apnea (OSAS) against healthy controls. The research found distinct metabolic alterations: patients with OSAS exhibited hypometabolism in fronto-parietal regions and hypermetabolism in the cerebellum. This cerebellar hyperactivity was specifically linked to impairments in REM sleep. Furthermore, seed-based connectivity analyses revealed disruptions in attentional and limbic brain networks, suggesting that OSAS may cause functional brain changes even before cognitive symptoms appear.

Why it might matter to you:
This work identifies a functional brain signature for a modifiable risk factor linked to neurodegeneration. For your work on actionable biomarkers, it highlights the potential of neuroimaging to detect early, pre-symptomatic dysfunction, which could be a critical window for intervention. The correlation between a specific metabolic change (cerebellar hypermetabolism) and a quantifiable sleep parameter (REM impairment) also demonstrates a model for linking multimodal data streams to pinpoint mechanistic pathways.


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