Circadian Rhythm Sleep-Wake Disorder, Non-24-Hour Sleep-Wake Type is a circadian rhythm sleep-wake disorder characterized by symptoms of insomnia or excessive sleepiness due to abnormal synchronization between the 24-hour light-dark cycle and the individual's endogenous circadian rhythm. Non-24-hour sleep-wake type is most common among individuals who are blind, are visually impaired, or have decreased light perception.
A persistent or recurrent pattern of sleep disruption that is primarily due to an alteration of the circadian system or to a misalignment between the endogenous circadian rhythm and the sleep-wake schedule required by an individual’s physical environment or social or professional schedule.
The sleep disruption leads to excessive sleepiness or insomnia, or both.
The sleep disturbance causes clinically significant distress or impairment in social, occupational, and other important areas of functioning.
Specify whether:
Specify if:
1 month but less than 3 months.3 months or longer.2 or more episodes occur within the space of 1 year.