Sleeping in is really cool, but the price is that cognitive ability may be impaired...

▎Editor of WuXi AppTec's content team Winter is approaching, and we are about to usher in a sweet period of months that can hardly be separated from the bed
.

I close the curtains and close my eyes, and no one knows how long I slept
.

 However, a new study in the academic journal "Brain" suggests that although long sleep is really good.
.
.
it does not make the brain healthier, but may be related to cognitive decline
.

 Image source: Beau M.
Ances, a neuroscientist at 123RF Washington University in St.
Louis, is an expert in dementia and other neurodegenerative diseases.
He often asks patients how they sleep, as if this is a very problematic link
.

 The vast majority of patients always answered that they did not sleep well, but once Dr.
Ances specifically helped them solve this problem, the patient's cognitive function seemed to have improved
.

 With age, the decline in individual sleep quality and the increase in Alzheimer's risk will affect the cognitive function of the brain
.

However, whether the two influence independently or complement each other is not too clear to us
.

 According to previous studies, Alzheimer's disease is the main cause of cognitive decline in the elderly, but the quality of sleep in these patients is also poor, which may promote the progress of the disease in a disguised form
.

 In this regard, researchers at Washington University in St.
Louis have recruited a group of volunteers many years ago to track their genetic and physiological indicators of Alzheimer's disease, as well as changes in cognitive abilities
.

 A total of 100 volunteers participated in the testing of the new study.
During the previous monitoring period of 4 and a half years on average, 11 of them and 1 volunteer respectively experienced very slight and slight cognitive impairment
.

 ▲Dr.
Beau M.
Ances, the main author of the study (picture source: personal homepage of the school’s official website), during the test, they need to provide a certain amount of cerebrospinal fluid samples for the detection of Alzheimer’s disease marker proteins and monitor them in the EEG device Sleep under
.

 From the overall data, there is a "U"-shaped relationship between sleep time and cognitive decline.
About 5.
5-7.
5 hours of sleep has a relatively small impact on cognitive ability, of which 7-8 hours of cognition The risk of damage will be the lowest
.

And if the sleep is less than 5.
5 or more than 7.
5 hours, it is directly proportional to the decline in cognitive test scores
.

 After the researchers adjusted other possible interfering factors, such as age, gender, and the level of Alzheimer’s disease-related proteins, this U-shaped relationship is still valid, which means that sleep time alone is enough to affect the cognitive ability of the brain Change-too little sleep is no good, too much sleep will have the same harm
.

 For people who like to sleep a long day, improving sleep efficiency is the key
.

"Except that too little sleep is related to cognitive decline, too much sleep has the same negative effect," said David Holtzman, the co-author of the study
.

"How did you sleep today? Reference: [1] Hit the sleep'sweet spot' to keep brain sharp.
Retrieved Oct 21, 2021 from https:// Brendan P Lucey, et al,.
Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer's disease.
Brain, 2021 DOI: 10.
1093/brain/awab272