* Delayed Sleep Phase Type.
* Advanced Sleep Phase Type.
* Irregular Sleep-Wake Type.
* Non-24-Hour Sleep-Wake Type. 
* Shift Work Type.

State University of New York at Albany

Circadian rhythm sleep-wake disorders happen when constant patterns of sleep disturbances occur. These disturbances can be caused by a new circadian rhythm or discrepancies between the person’s circadian rhythm and the sleep-wake schedule that is demanded by the person’s social life, occupation, or environment.

Circadian Rhythm Sleep-Wake Disorders

Whitbourne, S. K. (2023). Abnormal psychology: Clinical perspective on psychological disorder. (10th ed.). McGraw Hill.

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