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Circadian Rhythm Sleep Disorder

(circadian phase sleep disorder)
This Dyssomnia is diagnosed when the individual's own (endogenous) sleep-wake schedule is not synchronized with the schedule imposed from their environment, resulting in Insomnia and sleepiness which may occur regularly but at the inappropriate time.
Credit

Definition reprinted with permission from Culebras, Antonio, Clinical Handbook of Sleep Disorders, Butterworth-Heinemann

Old criteria for this diagnosis.

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