Deep sleep may protect memory against Alzheimer's decline

Researchers from the Universities of California, Berkeley, Stanford, and UC Irvine have identified deep sleep as a potential protective factor against the cognitive decline associated with Alzheimer's disease.

A study involving 62 cognitively healthy older adults revealed that participants who exhibited brain markers of Alzheimer's but maintained high-quality deep sleep performed better on memory tests. Neuroscientist Matthew Walker described deep sleep as a ‘life jacket’ that keeps memory afloat despite the presence of Alzheimer's-related brain changes.

Unlike many other risk factors, sleep is an actionable element of daily life. Additionally, research involving 700 women suggests that increased daytime fatigue and sleepiness may serve as early indicators of dementia as individuals age.