| 摘要 |
A cuff (10, 110) having stimulating electrodes (28, 128) providing a wakefulness electrical signal and a counter sleepiness electrical signal and a sleepiness detector (30, 130) coupled to a control unit (24, 124). The sleepiness detector (30, 130) detects an indicator of the onset of sleep, such as the heart rate, and provides a signal to the control unit (24, 124). The control unit (14, 124) analyzes the heart rate and determines signs of sleepiness. Upon the detection of signs of sleepiness, the counter sleepiness electrical signal is provided to the stimulating electrodes (28, 128), which contract muscles in a user, preferably the calf muscles. The muscle contraction provides a stimulus and improves circulation that prevents undesired sleep and maintains wakefulness. Alertness is also increased. The present invention is an aid in preventing sleepiness for use in many activities, such as prolonged driving, and performing other tedious or routine tasks. The invention also helps to improve alertness and fend off the onset of sleepiness increasing productivity and avoiding potentially dangerous accidents.
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