Definitions for "Parasomnias"
physical events that occur during sleep
sleep disorders that occur during sleep, or between sleep and waking. Includes nightmare disorder, sleep terror disorder, sleepwalking disorder.
As opposed to dyssomnias in which the clinical focus is a disturbance in the ability to initiate or maintain sleep, paradomnias are disorders of sleep characterized abnormal physiological or behavioral events that disrupt the normal stages of sleep. Parasomnias include sleep terrors, nightmares, and sleepwalking.