Advanced sleep phase disorder
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. 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.
| Advanced Sleep Phase Disorder | |
|---|---|
| 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 |
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