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Doctors have warned that lack of deep sleep and rest in the elderly could be an early sign of Alzheimer's disease before the onset of symptoms of loss and memory impairment.
In the United States, neuroscientists have discovered that volunteers who slept and slept little had higher levels of toxic tau, an abnormal protein molecule found in the brains of patients with Alzheimer's disease.
Previous research has shown a link between sleep and Alzheimer's disease, but it is thought that deep sleep is of great importance because it is at this point that the brain integrates memories. .
"The idea was not in the total number of sleep hours associated with Tau, but in a deep sleep, which reflects the quality of sleep, people who suffer from an increase Tau sleep less at night and spend more, "said Dr. Brendan Lucy of the Sleep Medicine Center at the University of Washington. Day, and then they do not sleep well. "
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The study, published in the journal Neurology, looked at 119 people, 80% of whom showed no sign of cognitive decline.
The brain activity of the volunteers was monitored during their sleep and the levels of TAO and beta-amyloid were measured by brain scans.
Alzheimer's disease is the most common cause of dementia and affects 50 million people worldwide.
Although there is no cure for stopping or slowing dementia, the ability to detect it before its symptoms will be a critical step in identifying people to test for future medications.
"We know that there is a link between sleep and dementia, but there is still a lot to learn about this relationship," said Dr. James Pickett, head of research at the Alzheimer's Association. "It is premature to say that trying to change our sleep patterns can affect our chances of dementia, but it is becoming more obvious that a healthy diet and physical activity can also reduce Risks, so grab an apple instead of a shib bag and walk as far as you can. "
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