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A brain disorder that is a common symptom of narcolepsy that can cause weakness or lack of muscle control.

Most attacks are brought on by strong or extreme emotional feelings, such as: Anger, stress, anxiety, depressed mood, or even joy.

Symptoms include reduced levels of hypocretin in the brain, drooping eyelids, inability to stand or move, loss of muscle tone, causing weakness or full paralysis, while remaining awake.
(Cataplexy - Image Courtesy of
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