Your sleep may be hiding an early clue to Alzheimer’s

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August 29, 2026, 3:45 AM

• •The study analyzed more than 500 healthy people, mostly aged 18 to 31, with an additional group aged 50 to 69.
• •Among middle-aged participants, more frequent nighttime micro-awakenings were associated with higher polygenic risk for Alzheimer’s disease.
• •Researchers found no comparable association between micro-awakenings and genetic risk in the younger group.
• •The work also points to the locus coeruleus, a small brainstem region involved in wakefulness, attention and sleep, as an area of interest in early Alzheimer’s mechanisms.
• •The article says the results are statistical associations only and cannot determine whether any individual will develop Alzheimer’s disease.

Researchers at the University of Liège studied sleep patterns and genetic risk scores for Alzheimer’s disease in more than 500 healthy participants. In adults aged 50 to 69, more frequent nighttime micro-awakenings were associated with higher polygenic risk for Alzheimer’s, while no such link appeared in younger adults. The team also highlighted the locus coeruleus, a small brainstem region tied to wakefulness and REM sleep that may be involved very early in the disease process. The findings suggest sleep measurements could someday help identify vulnerability before symptoms appear, but they do not show that these sleep changes cause or predict Alzheimer’s in any individual.

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