Advanced Sleep Phase Disorder | |
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Specialty | Chronobiology |
Symptoms | Earlier than desired onset and offset of sleep |
Complications | Sleep deprivation |
Risk factors | Increased incidence with age |
Diagnostic method | Polysomnography, Horne-Ostberg morningness-eveningness questionnaire |
Treatment | Bright light therapy, chronotherapy |
Advanced Sleep Phase Disorder (ASPD), also known as the advanced sleep-phase type (ASPT) of circadian rhythm sleep disorder, is a condition that is characterized by a recurrent pattern of early evening (e.g. 7-9 PM) sleepiness and very early morning awakening (e.g. 2-4 AM). This sleep phase advancement can interfere with daily social and work schedules, and results in shortened sleep duration and excessive daytime sleepiness.[1] The timing of sleep and melatonin levels are regulated by the body's central circadian clock, which is located in the suprachiasmatic nucleus in the hypothalamus.[2]
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