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 expressionnotably 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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My Own Private Idaho River Phoenix, Keanu Reeves, James Russo, and William
Richert 1991