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Definition of Microsleep


Updated February 18, 2014

Definition: A fleeting, uncontrollable episode of sleep which may last from a fraction of a second up to 10 seconds. These episodes occur most frequently when a sleepy person is trying to remain awake. It can lead to accidents involving cars or heavy machinery as well as other dangerous situations.
When Tate swerved the car at the sound of the rumble strip, he realized that he’d experienced a microsleep and suggested someone else drive.
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