After we hit the Middle Age, Seven Hours of Sleep demonstrates the trick

After we hit the Middle Age, Seven Hours of Sleep demonstrates the trick ...

According to researchers at the University of Cambridge and Fudan University, seven hours can be the ideal amount of sleep for people in their middle age and upwards, with too little or too much sleep resulting in poorer cognitive performance and mental health.

Sleep plays an important role in enabling cognitive function and maintaining good psychological health. It also assists in keeping the brain healthy by eliminating waste ingredients. As we become older, we often see changes in our sleeping patterns, including difficulty falling asleep and staying asleep, as well as decreased quantity and quality of sleep.

Scientists from the United Kingdom and China analysed data from around 500,000 adults aged 38-73 years old from the UK Biobank. Participants were asked about their sleeping patterns, mental health, and wellbeing, and took part in a series of cognitive tests. Nearly 40,000 participants were able to take Brain imaging and genetic information.

The team found that both insufficient and excessive sleep duration were linked to impaired cognitive performance, such as processing speed, visual attention, memory, and problem-solving skills. Seven hours of sleep per night was the best amount of sleep for cognitive performance, but also for good mental health, with people experiencing more symptoms of anxiety and depression, and worse overall wellbeing if they reported sleeping for longer or shorter periods.

According to the researchers, one possible reason for the association between inadequate sleep and cognitive decline may be the result of the disruption of slow-wave deep sleep. This type of sleep has been shown to have a close connection with memory consolidation as well as the build-up of amyloid, a key protein, which when it misfolds, may cause tangles in the brain characteristic of some forms of dementia. Additionally, lack of sleep may hinder the brain''s ability to flush itself of harmful substances.

A link between the amount of sleep and the structure of brain regions involved in cognitive processing and memory was found by the researchers, albeit with significant changes.

Being able to have a consistent seven hours sleep every night, without too much variation in duration, was also critical to cognitive performance and well-being. Moreover, previous studies have found that prolonged sleep patterns are linked to increased inflammation, indicating a susceptibility to age-related illnesses in elderly individuals.

According to Professor Jianfeng Feng of Fudan University in China, too little or too much sleep has causing cognitive difficulties. However, our examination of individuals over a longer period of time appears to be appropriate. However, the reasons why older people have poorer sleep appar to be complex due to a combination of our genetic makeup and the structure of our brains.

Researchers claim that inadequate or excessive sleep duration might be a risk factor for cognitive decline in ageing. This is supported by previous studies that have found a link between sleep duration and the risk of developing Alzheimers disease and dementia, in which cognitive decline is a hallmark symptom.

One of the researchers at the University of Cambridge, Professor Barbara Sahakian, said: "It''s important to stay awake at all stages of life, but especially as we age. "Being able to improve sleep for older people may be critical for their ability to maintain good mental health and well-being, especially for people with psychiatric difficulties and dementia.

The research was supported by the China National Key Research and Technology Major Project, the Shanghai Center for Brain Science and Brain-Inspired Technology, the 111 Project, the China National Natural Sciences Foundation, and the Shanghai Rising Star Program.

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