Cataplexy is a sudden, brief loss of voluntary muscle tone triggered by strong emotions such as laughter, excitement, anger or fear. There is a strong association between cataplexy and narcolepsy, a ...

Cataplexy is a sudden loss of muscle tone. It’s associated with a condition called narcolepsy. It can look like a seizure, but it’s not. Treatment involves medication and lifestyle changes. Cataplexy ...

Cataplexy, or sudden muscle weakness that can resemble fainting, may be prompted by strong emotions. This symptom isn't serious and mostly occurs with narcolepsy type one — otherwise, it's very rare.