Daydreaming and mind-wandering appear to occur when parts of the brain fall asleep while other areas remain awake.
A caffeine jolt may give you a little more energy following a restless night of sleep, but it doesn't necessarily help with boosting cognition. Researchers found that while caffeine helped sleep deprived students to perform better at some simple cognition tests, it had no effect on improving performance on more challenging tasks, like placekeeping tests.
Sleep duration of five hours or less was associated with double the risk of dementia in older adults. Sleep disruptions also increased death risk in those in their seventies.
As frailty worsened in older people, symptoms of depression increased. This was exacerbated by shortened sleep duration.
Sleep deprivation impairs our ability to stop obtrusive thoughts from entering our minds.
Study reveals how sleep deprivation can greatly affect soldiers on the battlefield.
Death caused as a result of sleep deprivation is preceded by the accumulation of reactive oxidative species in the gut.