Why Does Your Brain Struggle to Focus During the Day? Scientists Uncover the Cause

A research team from the Massachusetts Institute of Technology has identified a new explanation for a common issue many people face: reduced concentration during the day following a night of insomnia or insufficient sleep.

An article published in the scientific journal Nature Neuroscience explains that this phenomenon is due to a sudden movement of cerebrospinal fluid, a process that typically occurs during deep sleep to cleanse the brain of waste and toxins accumulated throughout the day.

The researchers noted that cerebrospinal fluid acts as a cleaning system for the brain, functioning effectively during sleep without impacting thought and attention.

However, in cases of sleep deprivation, the brain attempts to activate this cleansing function while awake, leading to decreased concentration levels.

The study involved 26 volunteers who underwent concentration tests and magnetic resonance imaging on two occasions:

first after a full night of sleep, and the second after a complete night of sleep deprivation.

The results indicated that volunteers responded to visual and auditory stimuli much more quickly after a good night's sleep, while their response speed decreased and some missed important cues during sleep deprivation.

Laura Lewis, a researcher and assistant professor at the institute, stated:

"When sleep-deprived, cerebrospinal fluid waves begin to circulate during the day, contradicting the person's sense of alertness. This weakens attention and affects concentration during critical moments."

In summary:

Sleep deprivation not only impairs memory but also occupies your brain with cleaning processes during the day, reducing your ability to concentrate and stay alert.