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Sleeping too much or too little is harmful to the brain.

 

      The ideal sleep time is 7 hours per night; Sleeping too little or too much can impair thinking.

A new study published on the JAMA Network Open on September 21 shows that too little or too much sleep is harmful to the brain. Too little sleep is equal to or less than 4 hours per night; 10 hours or more too much.

“Cognitive function should be monitored in people who don’t get enough sleep or sleep too much,” said study author Yanjun Ma, from Beijing University Clinical Research Institute. Research shows a link of too little or too much sleep with cognitive impairment.

Ma’s team collected data from more than 20,000 people from two studies on aging in the UK and retirement health in China. Participants reported sleeping habits and were given cognitive tests.

During follow-up, cognitive scores decreased faster in those who slept less than 4 hours, and more than 10 hours, compared to those who slept 7 hours per night.

According to the National Sleep Foundation, sleep is essential, helping the body and mind recharge. Without adequate sleep, the brain cannot function properly, reducing the ability to focus, think and remember.

Meanwhile, too little sleep can increase markers of Alzheimer’s disease, Ma added.

Dr. Sam Gandy, deputy director of the Alzheimer’s Research Center at Mount Sinai Medical Center in New York, said while we sleep, the brain works to remove excess toxins, including amyloid-beta. . This is an abnormally structured protein that, when present in the vessel wall or any other organ, poses a risk of disease. There are different types of protein amyloid, which cause many diseases, such as beta-amyloid protein that causes dementia (Alzheimer’s), alpha-synuclein protein that causes Parkinson’s disease.

Dr Yue Leng, assistant to professor of psychiatry at the University of California, San Francisco, said “more and more research has found a relationship between sleep duration and perception, and short and long naps are there. involves less perception. ”

Recommended adult sleep time is 7 to 9 hours per night. To have a good night’s sleep, doctors advise against leaving electronic devices such as computers and phones nearby. Do not drink stimulants or eat too full before bed. Exercise is a relaxing way to get deep sleep.

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