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Reduced Deep Sleep Linked to Higher Alzheimer’s Risk, Study Finds
A new study reveals that insufficient deep sleep, particularly slow-wave and REM sleep, may accelerate brain shrinkage in areas linked to Alzheimer’s disease. Researchers found that a lack of these sleep stages is associated with early neurodegeneration, impacting cognitive function. Experts emphasize the importance of sleep hygiene—maintaining consistent sleep schedules, minimizing disruptions, and avoiding alcohol before bed—to improve deep sleep quality. Prioritizing good sleep habits may help reduce Alzheimer’s risk and support long-term brain health.
A recent study highlights the significant impact of deep sleep, particularly slow-wave and rapid eye movement (REM) sleep, on brain health and the risk of Alzheimer’s disease. Researchers found that inadequate time spent in these sleep stages is linked to the shrinkage of specific brain regions, including the inferior parietal region, which plays a crucial role in processing sensory and spatial information. This early neurodegeneration could serve as a warning sign for cognitive decline and Alzheimer’s disease.
Dr. Gawon Cho, the study’s lead author, emphasized that deep sleep is essential for maintaining brain function, as it helps clear out toxins, repair cells, and consolidate memories. The findings were supported by neurologists like Dr. Richard Issacson, who noted that his clinical experience aligns with the study’s conclusions.
The research also underscores the natural decline of deep sleep as people age, making it even more critical to prioritize sleep quality. Experts recommend maintaining proper sleep hygiene by establishing consistent bedtime routines, reducing exposure to blue light before bed, and ensuring a dark, cool, and quiet sleep environment. They also caution against alcohol consumption before sleeping, as it can disrupt sleep cycles.
Since deep sleep occurs mostly in the early sleep stages, and REM sleep dominates later in the night, cutting sleep short can significantly reduce time spent in these vital phases. Studies show that maintaining uninterrupted, high-quality sleep not only benefits cognitive function but may also extend life expectancy by several years.
Although there is no single medication to enhance sleep quality, individuals can adopt habits that promote healthier sleep cycles. Experts encourage mindfulness techniques, relaxation exercises, and structured sleep schedules to maximize deep and REM sleep, which could help protect against cognitive decline and neurodegenerative diseases like Alzheimer’s.
Source:https://edition.cnn.com/2025/03/31/health/deep-rem-sleep-alzheimers-wellness/index.html
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