What is cataplexy characterized by?

Cataplexy is a sudden loss of muscle tone, often triggered by strong emotions such as laughter, surprise, or anger. This phenomenon is a hallmark symptom particularly associated with narcolepsy, a sleep disorder characterized by excessive daytime sleepiness. During an episode of cataplexy, individuals may experience a temporary inability to control muscle movements, which can lead to weakness in certain muscle groups or even a complete collapse while remaining fully conscious.

Understanding cataplexy is crucial as it can significantly impact the quality of life for those affected, given that it can occur unexpectedly in social situations. This differentiates it from other symptoms of sleep disorders, emphasizing the unique nature of cataplexy and its relationship with emotional stimuli. The other options, while they may be associated with sleep disorders, do not specifically define cataplexy’s unique characteristics.