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A team of researchers from the University of Ibadan has published a large-scale review of medical studies from the past 25 years examining the effects of sleep deprivation on brain function.
The study, featured in IBRO Neuroscience Reports, reveals an alarming pattern: even a single night without sleep can trigger processes in the body that resemble the early stages of Alzheimer’s disease.
Researchers found that sleep deprivation weakens connections between neurons, promotes inflammation, and contributes to the buildup of toxic proteins such as beta-amyloid and tau. These substances are key markers of neurodegenerative diseases in older adults.
The hippocampus — the brain region responsible for converting short-term memory into long-term memory — is particularly affected. Lack of sleep disrupts its ability to generate the electrical waves necessary for consolidating information acquired during the day.
The findings challenge the common belief that studying or working late at night improves performance. Instead, sleep loss leads to impaired emotional processing, mood disturbances, and the formation of false memories. For adults aged 18 to 64, experts strongly recommend getting seven to nine hours of sleep per night.
Unlike Alzheimer’s disease, the damage caused by sleep deprivation is typically reversible. To restore brain function, researchers advise maintaining a consistent sleep schedule, avoiding blue light exposure before bedtime, and creating a cool, quiet sleeping environment.
Short daytime naps lasting 10 to 30 minutes have also been shown to partially restore attention and improve cognitive performance after a poor night’s sleep.
