Cataplexy is one of the manifestations or symptoms of narcolepsy that is considered pathognomonic (meaning it almost is diagnostic).

What is cataplexy?

Cataplexy is a sudden weakness in the large skeletal muscles of the body such as legs, arms, neck muscles etc that is often triggered by an intense emotion such as laughter, fear, anxiety or other emotions. The person typically does not lose consciousness and there is loss of reflexes during an episode of cataplexy.

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