Free-running circadian rhythm disorder in the sighted – case report & discussion

Authors

  • Chang-Ho Yoon The University of Cambridge
  • Elizabeth A Hill The University of Edinburgh
  • Renata L Riha

DOI:

https://doi.org/10.2218/resmedica.v21i1.174

Abstract

Free-running disorder (FRD) is characterized by inability to maintain stable entrainment to a 24h sleep-wake pattern. Patients with FRD show a sleep/wake pattern similar to those observed in time-free environments bereft of zeitgebers.


FRD is common in blind patients, and rarely occurs in sighted individuals. In individuals with no visual impairment, males are more commonly affected. Here, two unusual cases of FRD in young, sighted females are presented. Both patients responded to treatment with melatonin, but derived no perceived benefit from phototherapy.

Author Biography

Chang-Ho Yoon, The University of Cambridge

PhD Research Fellow, Sleep Research Unit, Department of Sleep Medicine

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Published

30-Sep-2013

How to Cite

Yoon, C.-H., Hill, E. A., & Riha, R. L. (2013). Free-running circadian rhythm disorder in the sighted – case report & discussion. Res Medica, 21(1), 50–55. https://doi.org/10.2218/resmedica.v21i1.174

Issue

Vol. 21 No. 1 (2013): Autumn 2013

Section

Case Report

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