What is cataplexy syndrome? Cataplexy. This sudden loss of muscle tone while a person is awake leads to weakness and a loss of voluntary muscle control. It is often triggered by sudden, strong emotions such as laughter, fear, anger, stress, or excitement.
What does cataplexy feel like? Cataplexy is sudden muscle weakness triggered by strong emotions like embarrassment, laughter, surprise, or anger. Cataplexy can cause your head to drop, your face to droop, your jaw to weaken, or your knees to give way. Attacks can also affect your whole body and cause you to fall down.
What emotions trigger cataplexy? Some symptoms of narcolepsy depend on emotional stimuli; for instance, cataplectic attacks can be triggered by emotional inputs such as laughing, joking, a pleasant surprise, and also anger.
What can cause sudden loss of muscle tone? Loss of muscle function may be caused by: A disease of the muscle itself (myopathy) A disease of the area where the muscle and nerve meet (neuromuscular junction) A disease of the nervous system: Nerve damage (neuropathy), spinal cord injury (myelopathy), or brain damage (stroke or other brain injury)