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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]
According to the International Classification of Sleep Disorders, Revised (ICSD-R, 2001), [10] the circadian rhythm sleep disorders share a common underlying chronophysiologic basis: The major feature of these disorders is a misalignment between the patient's sleep-wake pattern and the pattern that is desired or regarded as the societal norm...
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.
ICD-9-CM: Circadian rhythm sleep disorder, free-running type; code 327.34 became effective in October 2005. Prior to the introduction of this code, the nonspecific code 307.45, Circadian rhythm sleep disorder of non-organic origin, was available, and as of 2014 remains the code recommended by the DSM-5.
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
DSPD is a circadian rhythm sleep disorder, characterised by a mismatch between a person's internal biological clock and societal norms. [2] Chronotherapy uses the human phase response to light or melatonin. The American Academy of Sleep Medicine has recommended chronotherapy for the treatment of circadian rhythm and sleep disorders. [3]
Jet lag disorder – Jet lag disorder is a type of circadian rhythm sleep disorder that results from rapid travel across multiple time zones. Individuals experiencing jet lag may encounter symptoms such as excessive sleepiness, fatigue, insomnia, irritability, and gastrointestinal disturbances upon reaching their destination.
Circadian disruption is a brief or long period of interference within a circadian rhythm. Chronodisturbance is the disruption of a circadian rhythm which leads to adaptive changes, leading to a less substantial negative impact in comparison to chronodisruption, which leads to disease. [40] Another notable researcher in the field is Mary E ...