Sleep Disorders: cataplexy

A sudden decrement in muscle tone and loss of deep tendon reflexes, leading to muscle weakness, paralysis, or postural collapse. Cataplexy usually is precipitated by an outburst of emotional expression—notably laughter, anger, or startle. One of the tetrad of symptoms of narcolepsy. During cataplexy, respiration and voluntary eye movements are not compromised.*

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Bandits Bruce Willis, Billy Bob Thornton, Cate Blanchett 2001
My Own Private Idaho River Phoenix, Keanu Reeves, James Russo, and William Richert 1991
Stateside Bridget Barkan, Ed Begley Jr., Shon Blotzer, Agnes Bruckner 2004