Scientists at Boston University (USA) found that during deep sleep, the "slow-wave" activity of nerve cells appears to give way to cerebrospinal fluid moving rhythmically into and out of the brain – a process thought to remove metabolic waste products.
These waste products include beta-amyloid—a protein that clumps abnormally in the brains of people with dementia, according to lead researcher Laura Lewis.
However, Lewis emphasized that the findings do not prove that deep sleep helps prevent dementia or other diseases. But the ultimate goal of this study is to understand why poor sleep quality is linked to an increased risk of various chronic diseases, from dementia to heart disease and depression.
According to the research team, cerebrospinal fluid helps remove metabolic waste products from the brain, preventing them from accumulating there, and this process appears to be accelerated during sleep.
Source: https://thanhnien.vn/giac-ngu-sau-thanh-loc-nao-185899376.htm
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