State of active attention by high sensory awareness such as being watchful
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Alertness is a state of active attention characterized by high sensory awareness. Someone who is alert is vigilant and promptly meets danger or emergency, or is quick to perceive and act. Alertness is a psychological and physiological state.
Lack of alertness is a symptom of a number of conditions, including narcolepsy, attention deficit disorder, chronic fatigue syndrome, depression, Addison's disease, and sleep deprivation. Pronounced lack of alertness is an altered level of consciousness. States with low levels of alertness include drowsiness.
The word is formed from "alert", which comes from the Italian all'erta (on the watch, literally: on the height; 1618).[citation needed]
Wakefulness refers mainly to differences between the sleep and waking states; vigilance refers to sustained alertness and concentration. Both terms are sometimes used synonymously with alertness.
emergency, or is quick to perceive and act. Alertness is a psychological and physiological state. Lack of alertness is a symptom of a number of conditions...
up alert in Wiktionary, the free dictionary. Alert or ALERT may refer to: Alertness, the state of active attention by high sensory awareness. Alert, Iran...
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placebo-controlled studies have not shown rilmenidine to have any effect on alertness at therapeutic doses (1 or 2 daily administrations of 1 mg). If these...
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Alert Music was a recording, publishing, producing, and artist management company founded in 1984 by W. Tom Berry, based in Toronto, Ontario, Canada....
alertness show no change based on duration of the nap for combating post-lunch dip, even for naps as short as 10 minutes. Napping enhances alertness in...