Circadian Rhythm Sleep Disorders & Delayed Sleep Phase Syndrome
Delayed Sleep Phase Syndrome is believed to be a disorder of the body's timing system - the biological clock. DSPS sufferers have difficulty falling asleep and difficulty waking because their biological clocks are out of phase with the sleeping and waking times expected of them. It is frequently associated with insomnia and depression.
CRSD: Circadian rhythm disorders are disorders in which there is a persistent or recurrent pattern of sleep disturbance due primarily to either alterations in the internal circadian timing system or misalignment between an individual's internal circadian rhythm of sleep propensity and the 24-hour social and physical environments. The primary symptoms of CRSDs are insomnia, excessive sleepiness during wake periods, or both. These disturbances are associated with impairment of social, occupational, or other areas of functioning.
Circadian Rhythm Disorders