circadian

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Related to Circadian rhythm sleep disorder: Delayed sleep phase syndrome, Parasomnias

circadian

 [ser″kah-de´an, ser-ka´de-an]
denoting a period of one day, or repeating every day; see circadian rhythm.
circadian rhythm sleep disorder a sleep disorder of the dyssomnia group, consisting of a lack of synchrony between the schedule of sleeping and waking required by the external environment and that of the person's own circadian rhythm. The cause is usually environmental, such as rotating shift work or long-distance air travel, but some individuals simply have natural circadian rhythms sharply different from the predominant one of their society.

cir·ca·di·an

(ser-kā'dē-ăn),
Relating to biologic variations or rhythms with a cycle of about 24 hours. Compare: infradian, ultradian.
[L. circa, about, + dies, day]

circadian

(sər-kā′dē-ən, -kăd′ē-, sûr′kə-dī′ən, -dē′-)
adj. Biology
Relating to or exhibiting approximately 24-hour periodicity.

cir·ca′di·an·ly adv.

cir·ca·di·an

(sĭr-kā'dē-ăn)
Relating to biologic variations or rhythms with a cycle of about 24 hours.
Compare: infradian, ultradian
[L. circa, about, + dies, day]

circadian

Exhibiting a 24 hour periodicity.

Circadian

Pertaining to biological rhythms occurring at approximately 24-hour intervals. Jet lag is caused by a disruption of the human body's circadian clock.
Mentioned in: Jet Lag

cir·ca·di·an

(sĭr-kā'dē-ăn)
Relating to biologic variations or rhythms with a cycle of about 24 hours.
[L. circa, about, + dies, day]
References in periodicals archive ?
Practice parameters for the clinical evaluation and treatment of circadian rhythm sleep disorders: An American Academy of Sleep Medicine Report.
Circadian rhythm sleep disorders in the blind and their treatment with melatonin.
Circadian rhythm sleep disorders. Indian J Med Res 2010; 131 : 141-9.
Assessment of excessive sleepiness and insomnia as they relate to circadian rhythm sleep disorders. J Clin Psychiatry.
Although these treatments are recommended as part of the Practice Parameter Guidelines for the Evaluation and Treatment of Circadian Rhythm Sleep Disorders from the American Academy of Sleep Medicine, (1,2) most have been evaluated in shift workers generally, rather than specifically in those with SWD.