Sleeping too much has the risk of dementia, and the memory decreases significantly after more than 9 hours
Recently, Miami Miller University in Florida published research results that people who sleep nine hours a night have a significant decline in memory and language skills, which are the early symptoms of dementia such as Alzheimer's disease. The study investigated the sleep of 5247 Hispanic Americans aged 45 to 75 for seven years. The results showed that people who slept 9 hours a night had a comprehensive decline in cognitive ability, learning ability, language fluency and memory. As soon as the news came out, it aroused people's discussion, and many people were even more worried. Does long sleep really have something to do with Alzheimer's disease?
In this regard, Yin Guoping, a young member of China sleep research association and chief physician of Otolaryngology Head and neck surgery of Tsinghua Changgeng Hospital Affiliated to Tsinghua University, said in an interview with science and Technology Daily that a large amount of evidence shows that insufficient sleep time (usually less than 6 hours a day) or the reduction of deep sleep due to some sleep diseases (such as sleep snoring) will increase the brain & beta; Amyloid concentration, while & beta; Amyloid can damage brain cognitive function and increase the risk of Alzheimer's disease. Good sleep can help the brain clean up & beta; Amyloid reduces the risk of Alzheimer's disease.
Interestingly, some studies have pointed out that too long sleep time (usually more than 9 hours a day) may also increase the risk of Alzheimer's disease. A large follow-up study showed that people who slept more than 9 hours a day had about twice the risk of Alzheimer's disease than those who slept less than 9 hours. Several other follow-up results of different populations have reached similar conclusions. " However, it should be noted that these findings only prove the correlation between prolonged sleep and Alzheimer's disease, not the exact causal relationship. " Yin Guoping said that some scholars believe that too long sleep time may be an early symptom of Alzheimer's disease.
'it should be noted that the length of sleep varies from person to person, and a small number of healthy people will show that the sleep time is too short or too long. Therefore, if a person's sleep time remains relatively stable and does not affect his normal physiological function and work life ability, it can be considered normal. However, if there is any obvious change in sleep time or state, we should pay attention to it and seek medical treatment as soon as possible, so as to avoid serious complications. " Yin Guoping stressed.