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A circadian rhythm is an entrainable, endogenous, biological activity that has a period of roughly twenty-four hours. This internal time-keeping mechanism is centralized in the suprachiasmatic nucleus (SCN) of humans, and allows for the internal physiological mechanisms underlying sleep and alertness to become synchronized to external environmental cues, like the light-dark cycle. [4]
All of these are examples of circadian rhythm disorders, which are problems with the alignment between your sleep-wake cycle and your responsibilities for the day—like going to work or school ...
Generally, diseases outlined within the ICD-11 codes 7A60-7A6Z within Sleep-wake disorders should be included in this category. Pages in category "Circadian rhythm sleep–wake disorders" The following 5 pages are in this category, out of 5 total.
327.31 Circadian rhythm sleep disorder, delayed sleep phase type; 327.32 Circadian rhythm sleep disorder, advanced sleep phase type; 327.33 Circadian rhythm sleep disorder, irregular sleep-wake type; 327.34 Circadian rhythm sleep disorder, free-running type; 327.35 Circadian rhythm sleep disorder, jet lag type
Circadian rhythm sleep disorder, advanced sleep phase type 327.32 G47.22 Circadian rhythm sleep disorder, irregular sleep-wake type 327.33 G47.23 Circadian rhythm sleep disorder, free-running (non-entrained) type 327.34 G47.24 Circadian rhythm sleep disorder, jet lag type 327.35 G47.25 Circadian rhythm sleep disorder, shift work type 327.36 G47.26
The current formal name established in the third edition of the International Classification of Sleep Disorders (ICSD-3) is delayed sleep-wake phase disorder. Earlier, and still common, names include delayed sleep phase disorder (DSPD), delayed sleep phase syndrome (DSPS), delayed sleep phase type (DSPT), and circadian rhythm sleep disorder. [37]
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).
Although circadian rhythms are endogenous, they are adjusted to the local environment by external cues called zeitgebers (from German Zeitgeber (German: [ˈtsaɪtˌɡeːbɐ]; lit. ' time giver ')), which include light, temperature and redox cycles. In clinical settings, an abnormal circadian rhythm in humans is known as a circadian rhythm sleep ...