You're sleep-deprived if you feel tired during the day and/or have trouble staying awake. There are various sleep disorders: insomnia (difficulty falling asleep, night-time awakenings, early awakening), hypersomnia (excessive need for sleep), narcolepsy (excessive sleep time), snoring, sleep apnea (interruption of breathing during the night), restless legs syndrome, sleep-wake rhythm disorders, somnambulism and somniloquy (talking or making sounds during the night).

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For further information, we recommend that you consult :

- Institut national du Sommeil et de la Vigilance website
- Morphée network website (health network dedicated to the management of chronic sleep disorders)
- The website of ANSES, the French Agency for Food, Environmental and Occupational Health and Safety (Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail)
- The Santé Publique France website, and its documents on sleep