Overview

Delayed sleep phase — officially known as delayed sleep-wake phase sleep disorder — is an internal sleep clock (circadian rhythm) sleep disorder in which your sleep pattern is delayed two hours or more from a conventional sleep pattern, causing you to go to sleep later and wake up later.

Delayed sleep phase care at Mayo Clinic

Aug. 25, 2017
References
  1. Auger RR. Delayed sleep-wake phase disorder. https://www.uptodate.com/home. Accessed May 2, 2017.
  2. AskMayoExpert. Circadian rhythm sleep disorders. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2017.
  3. Feldman MD, et al., eds. Sleep disorders. In: Behavioral Medicine: A Guide for Clinical Practice. 4th ed. New York, N.Y.: The McGraw Hill Companies; 2014. http://accessmedicine.mhmedical.com. Accessed May 2, 2017.
  4. Longo DL, et al., eds. Sleep disorders. In: Harrison's Principles of Internal Medicine. 19th ed. New York, N.Y.: McGraw-Hill Education; 2015. http://accessmedicine.mhmedical.com. Accessed May 2, 2017.
  5. Richardson CE, et al. Can exercise regulate the circadian system of adolescents? Novel implications for the treatment of delayed sleep-wake phase disorder. Sleep Medicine. In Press. Accessed May 2, 2017.
  6. Golden AK. Decision Support System. Mayo Clinic, Rochester, Minn. April 24, 2014.
  7. Auger RR, et al. Clinical practice guideline for the treatment of intrinsic circadian rhythm sleep-wake disorders: Advanced sleep-wake phase disorder (ASWPD), delayed sleep-wake phase disorder (DSWPD), non-24-hour sleep-wake rhythm disorder (N24SWD), and irregular sleep-wake rhythm disorder (ISWRD). An Update for 2015. Journal of Clinical Sleep Medicine. 2015;11:1199.