Yes, it is possible for your brain to function on 7 hours of sleep. However, this is not recommended as the optimal amount of sleep for healthy brain functioning. The National Sleep Foundation recommends that adults get 7 to 9 hours of sleep each night. Studies have found that people who get fewer than 7 hours of sleep are more prone to memory problems, decreased alertness, and a reduced ability to concentrate.
In addition, research has shown that inadequate sleep can have long-term impacts on your brain. Studies have found that a lack of sleep can lead to a decrease in cognitive function, an increased risk of depression, and an impaired ability to make decisions. It can also impair your ability to respond to stress and can lead to an increased risk of developing neurological conditions such as Alzheimer’s disease.
Therefore, while it is possible to survive on 7 hours of sleep, it is not recommended. The National Sleep Foundation recommends that adults get 7 to 9 hours of sleep each night for optimal brain functioning and to reduce the risk of developing neurological conditions.