Alertness

Resetting the metabolic clock

We've all heard about circadian rhythm, the roughly 24-hour oscillations of biological processes that occur in many living organisms. Yet for all its influence in many aspects of our lives—from sleep to ...

Jan 29, 2014
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Does caffeine enhance performance?

Unlike many drugs, caffeine may be taken legally by people of all ages, which helps make it the world's most widely used stimulant.

Jan 10, 2014
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Neurons coordinate to fine-tune motor control

Whether it is playing a piano sonata or acing a tennis serve, the brain needs to orchestrate precise, coordinated control over the body's many muscles. Moreover, there needs to be some kind of feedback from ...

Feb 28, 2014
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Alertness is the state of paying close and continuous attention, being watchful and prompt to meet danger or emergency, or being quick to perceive and act. It is related to psychology as well as to physiology. A lack of alertness is a symptom of a number of conditions, including narcolepsy, attention deficit disorder, chronic fatigue syndrome, depression, Addison's disease, or sleep deprivation. The word is formed from "alert", which comes from the Italian "all'erta" (on the watch, literally, on the height; 1618)

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