A condition caused by lack of sleep. Sleep deprivation is very common in the United States, according to research findings. Most American adults sleep only about 6 hours per night, even though most need 8 or more hours of sleep. Sleep deprivation promotes excessive sleepiness during the day and interferes with daily activities, including driving. Sleep deprivation also affects mood and emotional well-being.
Lack of adequate sleep can result in irritability and a reduced ability to focus after a brief night of rest. Extended periods of sleep deprivation can impair concentration and the execution of everyday activities. Experiencing three or more consecutive nights without sleep can potentially lead to hallucinations and occasionally even induce feelings of paranoia.