Recently, a study of the elderly found that even if the effects of early Alzheimer’s disease are taken into account, people who sleep for a long time and those who sleep for a long time have more severe cognitive decline than those with moderate sleep.
Alzheimer's disease is the main cause of cognitive decline in the elderly, and about 70% of dementia cases are related to this
Poor sleep quality and Alzheimer's disease are both related to cognitive decline, and distinguishing the effects of the two has previously proved challenging
The lead author of the study, Brendan Lucey, associate professor of neurology at the University of Washington Sleep Medicine Center, said that the study showed that there is an intermediate range of total sleep time within which cognitive performance remains stable over time
"Short and long sleep periods are related to poor cognitive performance, which may be caused by insufficient sleep or poor sleep quality
The researchers investigated the sleep and Alzheimer’s data of 100 participants.
The results show that there is a U-shaped relationship between sleep and cognitive decline
Lucey said that the sleep time estimated by EEG is often about an hour shorter than the self-reported sleep time, so the result is equivalent to the self-reported sleep time of 5.
"It is particularly interesting that not only people who sleep for a short time, but people who sleep for a long time also have a greater decline in cognitive ability
Lucey said that everyone’s sleep needs are unique, and those who wake up and feel that sleep is short or long should not be forced to change their habits
Related paper information: https://doi.
https://doi.
org/10.
1093/brain/awab272
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