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Sleep. Sleeping Girl, Domenico Fetti, c. 1615. Sleep is a state of reduced mental and physical activity in which consciousness is altered and certain sensory activity is inhibited. During sleep, there is a marked decrease in muscle activity and interactions with the surrounding environment.
Psychiatry. Somnolence (alternatively sleepiness or drowsiness) is a state of strong desire for sleep, or sleeping for unusually long periods (compare hypersomnia). It has distinct meanings and causes. It can refer to the usual state preceding falling asleep, [1] the condition of being in a drowsy state due to circadian rhythm disorders, or a ...
Cognitive behavioral therapy, caffeine (to induce alertness), sleeping pills. Sleep deprivation, also known as sleep insufficiency[ 2 ] or sleeplessness, is the condition of not having adequate duration and/or quality of sleep to support decent alertness, performance, and health. It can be either chronic or acute and may vary widely in severity ...
Sleepy (rapper) (born 1984), a South Korean rapper part of the hip hop duo Untouchable. Sleepy Bill Burns (1880–1953), American baseball player. Sleepy Brown (born 1970), African American musician. Sleepy John Estes (1899–1977), African American musician. Sleepy Floyd (born 1960), retired American professional basketball player.
An oil painting of a young woman having a siesta, or an afternoon nap, which usually occurs after the mid-day meal. Postprandial somnolence (colloquially known as food coma, after-dinner dip, or "the itis") is a normal state of drowsiness or lassitude following a meal. Postprandial somnolence has two components: a general state of low energy ...
That includes functions such as learning, motivation, sleep, attention and mood. From an evolutionary standpoint, dopamine rewards you when you’re doing things necessary for survival, such as ...
Sleep paralysis. The Nightmare by Swiss artist Henry Fuseli (1781) is thought to be a depiction of sleep paralysis perceived as a demonic visitation. Sleep paralysis is a state, during waking up or falling asleep, in which a person is conscious but in a complete state of full-body paralysis. [1][2] During an episode, the person may hallucinate ...
Sleep disorder. A sleep disorder, or somnipathy, is a medical disorder of an individual's sleep patterns. Some sleep disorders are severe enough to interfere with normal physical, mental, social and emotional functioning. Sleep disorders are frequent and can have serious consequences on patients' health and quality of life. [ 1 ]