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Sleep deprivation disproportionately affects healthcare workers, especially those who work shifts. Significant cognitive impairments, such as shorter attention spans, slower reaction times, and mistakes in patient care tasks during night shifts, were found in a study of nurses working rotating hours.
NREM sleep is characterized by slow oscillations, spindles and delta waves. The slow oscillations have been shown to be from the cortex, as lesions in other parts of the brain do not affect them, but lesions in the cortex do. [70] The delta waves have been shown to be generated by recurrent connections within the cerebral cortex.
Sleep deprivation tends to cause slower brain waves in the frontal cortex, shortened attention span, higher anxiety, impaired memory, and a grouchy mood. Conversely, a well-rested organism tends to have improved memory and mood. [ 37 ]
"The mechanisms that rid waste from the brain are far more active when we sleep." When you have healthy sleep, the glymphatic system in your brain—which pumps out waste products—is more active ...
The study’s first finding is that sleeping between 7 and 9 hours each night was optimal for brain function and boosting cognitive ability. Sleeping less than 7 hours and more than 9 hours ...
An indicator of sleep propensity can also be seen in the shortening of the transition from light stages of non-REM sleep to deeper slow-wave oscillations. [69] On average, the latency in healthy adults decreases by a few minutes after a night without sleep, and the latency from sleep onset to slow-wave sleep is halved. [69]
To improve your sleep at night, establish a consistent morning routine: Focus on waking up around the same time each day (including weekends and holidays), and try to expose yourself to circadian ...
In a study where subjects were restricted to 4 hours of sleep per night for 2 nights, leptin levels decreased by 18% and ghrelin levels increased by 28%. In addition, there was an increase in hunger rating by 23%, with leptin levels being a significant predictor of hunger levels.