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: the natural, easily reversible, periodic state of many living things that is marked by the absence of wakefulness and by the loss of consciousness of one's surroundings, is accompanied by a typical body posture (as lying down with the eyes closed), the occurrence of dreaming, and changes in brain activity and physiological functioning, is ...
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.
Oct 1, 2021 · From observing changes in behavior and responsiveness, scientists have noted the following characteristics that accompany and in many ways define sleep: Sleep is a period of reduced activity. Sleep is associated with a typical posture, such as lying down with eyes closed in humans.
Jun 8, 2024 · Sleep, a normal, reversible, recurrent state of reduced responsiveness to external stimulation that is accompanied by complex and predictable changes in physiology. Sleep contrasts with wakefulness, in which state there is an enhanced potential for sensitivity and an efficient responsiveness to external stimuli.
SLEEP definition: 1. the resting state in which the body is not active and the mind is unconscious: 2. to start…. Learn more.
Sleep definition: to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease being awake.. See examples of SLEEP used in a sentence.
SLEEPING definition: 1. in or relating to the state of sleep: 2. the state or condition of being in a state of sleep…. Learn more.
a natural and periodic state of rest during which consciousness of the world is suspended. “he didn't get enough sleep last night” synonyms: slumber. see more. noun. a period of time spent sleeping. “he felt better after a little sleep ” synonyms: nap. see more. noun. a torpid state resembling deep sleep. synonyms: sopor. see more. noun.
Oct 23, 2020 · Sleep is a complex and dynamic biological process that still isn’t fully understood. Learn about how sleep works and why it’s vital for overall health.
Jun 18, 2024 · Without sleep you can’t form or maintain the pathways in your brain that let you learn and create new memories, and it’s harder to concentrate and respond quickly. Sleep is important to a number of brain functions, including how nerve cells (neurons) communicate with each other.
