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23 de may. de 2024 · Now, an NIH-supported team of researchers has mapped the connectivity of a neural network they suggest is essential for wakefulness, or arousal, in the human brain. According to the researchers, this advance, reported in Science Translational Medicine, is essential for understanding human consciousness.
13 de may. de 2024 · Two primary processes regulate sleep and wakefulness as formalized in Alexander Borbély’s seminal two-process model (Borbély, 2022) (Fig. 3). The circadian process synchronizes an organism’s wakefulness and sleep to zeitgebers, such as the light and dark in its environment.
18 de may. de 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.
21 de may. de 2024 · The neurotransmitters acetylcholine and serotonin are active, promoting the transition from wakefulness to sleep. Deep sleep: Brain activity changes to show low, high-amplitude delta brain waves. Increase in blood supply to the muscles, hormone release (including growth hormone), and cellular repair take place.
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13 de may. de 2024 · 1 Citations. 602 Altmetric. Metrics. Abstract. It has been suggested that the function of sleep is to actively clear metabolites and toxins from the brain. Enhanced clearance is also said to occur...
17 de may. de 2024 · Sleep articles from across Nature Portfolio. Sleep is a state characterized by a reduced responsiveness to sensory stimuli, suppressed locomotor activity and rapid reversibility to wakefulness....
