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Updated: Dec 18, 2025

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
[Circadian rhythm sleep disorders: clinical picture, diagnosis and treatment]
Gianina Luca1, Sandra Van Den Broecke1
1Unité d'exploration du sommeil et de l'éveil, Service de pneumologie, Réseau hospitaliser neuchâtelois, 45, rue de la Maladière, 2000 Neuchâtel.
Abstract:
Circadian rhythm sleep disorders (CRSD) represent sleep-wake disturbances due to a disruption of endogenous circadian system or to a desynchronization between internal sleep-wake rhythms and the external environment. They comprise seven diagnostic entities grouped in two main categories: endogenous and exogenous. The patients typically describe chronic excessive daytime sleepiness and/or insomnia symptoms, impacting their daytime functioning. The exact prevalence of CRSD is probably underestimated. The diagnosis is based on sleep diary coupled with actigraphy. Several therapeutic options are validated to allow the realignment between endogenous circadian rhythm and the external environment. The correct diagnostic of CRSD is important to improve the patient's quality of life and to propose them appropriate treatment.
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