A prolonged sleep is an alarming symptom of impending dementia
98 days...
If an elderly person often sleeps during the day or long sleeps at night, he may develop dementia, French neurologists say. Dr. Claudine Burr and colleagues from the National Institute of Health and Medical Research have examined the condition of 5,000 people over 65 years of age.
One-fifth of those who slept too much did not do well with tests on intellectual abilities. That is, the quality of sleep can be an indicator of the deterioration of a person's condition, writes The Telegraph .
And within the framework of another scientific work, conducted by Elizabeth Devor of the Women's Hospital of Britain, the state of 15,000 former nurses over 70 was investigated. It turned out that when a woman slept more than nine hours per night or less than five, her test scores decreased.
Plus, the brain recorded chemical changes, characteristic of the early stage of Alzheimer's disease.