Circadian Rhythm Sleep-Wake Disorder, Irregular Sleep-Wake Type is a circadian rhythm sleep-wake disorder characterized by symptoms of insomnia at night (during the usual sleep period) and excessive sleepiness (napping) during the day. Additionally, there is no discernable sleep-wake circadian rhythm, no major sleep period, and sleep is fragmented into at least three periods during a 24-hour day.
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.