Delayed Sleep Phase Disorder
Also known as: DSPD; Delayed Sleep Phase Syndrome; Shift Syndrome; Shift Work Disorder
Description
Delayed Sleep Phase Disorder is a type of Insomnia where persons are unable to fall asleep at the desired clock-time but have little difficulty in falling asleep if bedtime is delayed for several hours. The duration of Sleep is usually normal. It is classed as a Circadian Rhythm Disorder.
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