Delayed sleep phase syndrome

Also known as: Delayed sleep–wake phase disorder

Persistent delay of sleep timing relative to desired schedule.

Medical specialty: Psychiatry
Subspecialty: Psychiatry / Sleep disorders
Sex & age distribution: Male: affected; Female: affected; Children: yes, adolescents
Gene(s) involved: CLOCK, CRY1, PER3

Etiology & mechanism

Circadian clock phase delay.

Gene(s) involved (3)

CLOCKCRY1PER3

Symptoms & signs (4)

daytime sleepinessdifficulty falling asleep until latedifficulty wakingschool or work impairment

SyndromeScope — educational reference. Content is model-generated and not clinically verified; always confirm against OMIM, Orphanet and GeneReviews before clinical use.