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Neurology 2003;60:1841-1843
© 2003 American Academy of Neurology
Brief Communications

Non-24-hour sleep–wake syndrome following a car accident

D. B. Boivin, MD PhD, F. O. James, MSc, J. B. Santo, BA, O. Caliyurt, MD and C. Chalk, MD CM, FRCPC

From the Center for Study and Treatment of Circadian Rhythms (Drs. Boivin and Caliyurt, F.O. James and J.B. Santo), Douglas Hospital Research Center, Verdun; Department of Psychiatry (Drs. Boivin and Caliyurt, F.O. James and J.B. Santo), McGill University, Montreal; and Department of Neurology and Neurosurgery (Dr. Chalk), Montreal General Hospital, McGill University, Montreal, Quebec, Canada.

Address correspondence and reprint requests to Diane B. Boivin, MD, PhD, Center for Study and Treatment of Circadian Rhythms, Douglas Hospital Research Center, 6875 LaSalle Blvd., Suite F-1127, Verdun, Quebec, Canada H4H 1R3; e-mail: boidia{at}douglas.mcgill.ca

The authors report the case of a 39-year-old sighted woman who displayed non-24-hour sleep–wake cycles following a car accident. The phase relationship between endogenous circadian markers such as plasma melatonin and 6-sulfatoxymelatonin rhythms and self-selected sleep times was abnormal. A laboratory investigation indicated that she was sensitive to bright light as a circadian synchronizer. MRI and brain CT scans were normal, but microscopic brain damage in the vicinity of the suprachiasmatic nucleus or its output pathways is plausible.




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L. Ayalon, K. Borodkin, L. Dishon, H. Kanety, and Y. Dagan
Circadian rhythm sleep disorders following mild traumatic brain injury
Neurology, April 3, 2007; 68(14): 1136 - 1140.
[Abstract] [Full Text] [PDF]


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