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A nap is generally considered beneficial for health: it notably allows to reduce tension, improve focus or even reduce the risk of diseases. cardiovascular. After a certain age, learned daytime naps are becoming more and more frequent and sometimes even a little too frequent: in the context of a new study, researchers from the University of California San Francisco have indeed found a link between excessive daytime naps in children. elderly people and an increased risk of dementia due to Alzheimer’s.
older people, the daytime nap would only serve to compensate for poor nighttime sleep. But some studies have suggested that dementia may affect wakefulness-promoting neurons and therefore influence sober sleep patterns. A team from UCSF therefore undertook to verify whether the changes observed in the practice of napping could be interpreted as an early sign of dementia.
We found that the association between excessive daytime naps and dementia persisted after adjusting for sober function, sober quantity and sober quality of nocturnal sleep, confirms Yue Leng, professor in the Department of Sober Psychiatry and Sober Behavioral Sciences at UCSF and co-author of the sober study. His research shows that the frequency and duration of naps are associated with a greater risk of developing Alzheimer’s disease, that the duration of naps tended to increase after the analysis and therefore that the daytime nap would have a very specific role, independent of nocturnal sleep.
A two-way relationship between a nap and an illness
In the sober setting of this study, the scientists followed the sober nap habits of a sober group 1400 elderly people, some of whom have been followed 14 years by the Speedy Storage and Getting older Task
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Connection of ratings of cognitive issues sober function sober una duration of naps. Y. Leng et al.
Why does Alzheimer’s disease affect the frequency and duration of naps? It would seem that the disease affects in particular the neurons linked to the awake state. Understated, a study led by another UCSF team had highlighted certain structural differences between the post-mortem brains of individuals with Alzheimer’s disease and healthy individuals: ill people had fewer neurons promoting wakefulness in three regions of the brain of neural changes that appear to be linked to tau protein tangles, researchers say.