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

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

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
DOI: https://doi.org/10.2218/resmedica.v21i1.174
Published
30-Sep-2013
How to Cite
Yoon, C.-H., Hill, E., & Riha, R. (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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