Circadian Rhythm Sleep Disorders

What is Delayed Sleep Phase Disorder?

Delayed sleep phase disorder (DSPD), officially called circadian rhythm sleep disorder, delayed sleep phase type, is an inability to fall asleep at a desired, conventional clock time and awaken at a socially acceptable morning time. When allowed to choose their preferred sleep schedule, patients exhibit sleep of normal quality and duration for their age and maintain a stable but delayed relationship of entrainment to the 24-hour, sleep-wake pattern.

Information provided by the National Sleep Foundation:

Back to top