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Circadian rhythm sleep disorders (CRSD), also known as circadian rhythm sleep–wake disorders (CRSWD), are a family of sleep disorders that affect the timing of sleep. CRSDs cause a persistent pattern of sleep/wake disturbances that arise either by dysfunction in one's biological clock system, or by misalignment between one's endogenous oscillator and externally imposed cues.
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 ...
One factor that could explain this change in sleep architecture is a disruption in the circadian rhythm, which regulates sleep. [19] This disruption can lead to sleep disturbances. [19] Some studies show that people with Alzheimer's disease have a delayed circadian rhythm, whereas in normal aging, an advanced circadian rhythm is present. [19] [20]
Instead of being disorders, familial sleep traits are variations in an individual's biological tendencies of sleep-wake times, and are only considered syndromes if affected individuals complain about life interference, in which case they may fall under the category of Circadian Rhythm Sleep Disorders (CRSD) that affect sleep timing and ...
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...
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. ICD-10-CM: Circadian rhythm sleep disorder, free running type; code G47.24 was due to take effect October 1, 2014.
It has been found that emotions vary depending on the circadian rhythm and the duration of how long one was awake. [45] Circadian sleep-rhythm disorders like shift-work disorder or Jetlag-disorder have been found to similarly contribute to the Dysregulation of affect, with symptoms like irritability, anxiety, apathy and dysphoria. [46]
Shift work sleep disorder (SWSD) is a circadian rhythm sleep disorder characterized by insomnia, excessive sleepiness, or both affecting people whose work hours overlap with the typical sleep period. Insomnia can be the difficulty to fall asleep or to wake up before the individual has slept enough. [ 1 ]