A<unk>  is any sleep disorder such as sleepwalking, sleepeating, sleep sex, teeth grinding, night terrors, rhythmic movement disorder, REM behaviour disorder, restless legs syndrome, and somniloquy, characterized by partial arousals during sleep or during transitions between wakefulness and sleep.<unk> s are often associated with stress and depression, and biological factors may also be involved. Many<unk> s are more common in children than in adults.
Unlike dyssomnias,<unk> s do not involve abnormalities of the mechanisms generating sleep-wake states, nor of the timing of sleep and wakefulness. Rather,<unk> s represent the activation of physiological systems at inappropriate times during the sleep-wake cycle. In particular, these disorders involve activation of the autonomic nervous system, motor system, or cognitive processes during sleep or sleep-wake transitions.<unk> s occur during deep sleep (stages III and IV). On an electroencephalogram (EEG), this corresponds to slow wave sleep.
Many<unk> s, such as sleepwalking, have serious risks. For example, a person with REM behavior disorder, while trying to swing a tennis racket in a dream, can potentially injure their bedmate. People with night terrors can prevent others from sleeping well, as well as waking themselves up. For these reasons,<unk> cs sometimes need medical treatment.
Parasomnia
Insomnia
Hypersomnia
Dyssomnia
Sleep hyperhidrosis
Euphorbia
Sleepwalking
Amnesia