Conditions characterized by disturbances of usual sleep patterns or behaviors. SLEEP WAKE DISORDERS may be divided into three major categories: DYSSOMNIAS (i.e. disorders characterized by insomnia or hypersomnia), PARASOMNIAS (abnormal sleep behaviors), and SLEEP WAKE DISORDERS secondary to medical or psychiatric disorders. (From Thorpy, Sleep Disorders Medicine, 1994, p187)

Abnormal sleep-wake schedule or pattern associated with the CIRCADIAN RHYTHM which affect the length, timing, and/or rigidity of the sleep-wake cycle relative to the day-night cycle.

Synonyms: Sleep-Related Neurogenic Tachypneas, Disorder, Sleep, Neurogenic Tachypnea, Sleep-Related, Short Sleeper Syndromes, Sleep Wake Disorder, Syndromes, Long Sleeper, Tachypnea, Sleep-Related Neurogenic, Short Sleep Phenotype, Sleeper Syndrome, Short, Sleep Disorder, Wake Disorders, Sleep, Neurogenic Tachypneas, Sleep-Related, Subwakefullness Syndromes, Sleep Related Neurogenic Tachypnea, Sleeper Syndrome, Long, Tachypneas, Sleep-Related Neurogenic, Long Sleeper Syndromes, Syndromes, Short Sleeper, Sleep Disorders, Long Sleeper Syndrome, Wake Disorder, Sleep, Phenotypes, Short Sleep, Sleep Wake Disorders, Syndromes, Subwakefullness, Sleeper Syndromes, Long, Short Sleeper Syndrome, Subwakefullness Syndrome, Disorders, Sleep Wake, Phenotype, Short Sleep, Disorder, Sleep Wake, Syndrome, Long Sleeper, Sleep-Related Neurogenic Tachypnea, Sleep Phenotypes, Short, Sleeper Syndromes, Short, Disorders, Sleep, Syndrome, Short Sleeper, Syndrome, Subwakefullness, Short Sleep Phenotypes