New research has revealed an unusual and unexpected process occurring in the brains of people suffering from sleep deprivation.
According to the study, difficulties in maintaining focus, slower reaction times, and reduced thinking ability after poor sleep are not merely the result of fatigue, but are linked to a specific biological mechanism taking place inside the brain.
The research, conducted by the Massachusetts Institute of Technology (MIT) in the United States, examined the changes that occur in the brain when adequate sleep is not achieved.
Scientists found that under such conditions, the movement of a special fluid inside the brain increases, temporarily impairing the ability to concentrate.
According to the findings, cerebrospinal fluid (CSF) is normally most active during sleep, when it helps clear waste materials that accumulate in the brain throughout the day.
This cleansing process is considered essential for maintaining brain health. However, in cases of sleep deprivation, this system becomes active even during wakefulness.
Researchers explained that when CSF begins moving while a person is awake, the brain struggles to maintain attention during those moments.
This mechanism appears to be the brain’s attempt to compensate for lost sleep, but the immediate cost is reduced mental focus and alertness.
The study involved 26 volunteers, who were tested in two phases — one following sleep deprivation and the other after a full night’s rest. Brain function was assessed the following morning through various cognitive tasks. The research findings were published in the scientific journal Nature Neuroscience.
