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What is Circadian Rhythm Sleep Disorder

Circadian Rhythm Sleep Disorder, or "CRSD" is a disease that causes sleep to be desynchronized with an individual's circadian rhythm. CRSD occurs when a person’s typical sleep times are misaligned or out of sync with the environment. This often results in the patient being unable to fall asleep at night, and staying awake throughout the day. CRSD can be caused by genetics, environmental conditions or other factors.



The body's internal clock is made up of 24-hour cycles called circadian rhythms that work in the background to carry out vital processes and functions. The sleep-wake cycle is one of the most significant and well-known circadian rhythms. The cycle of sleeping at night and being up during the day is one example. Your body's circadian rhythm is made up of a number of elements. All living organism species have circadian rhythms. It prevents nocturnal creatures from leaving their shelter during the day, when they would be more vulnerable to predators, they can, for instance, assist flowers in opening and closing at the proper times.


Circadian rhythms in people coordinate all bodily mental and physical systems. For example, to coincide with the regular timing of meals, the digestive system creates proteins, and the endocrine system controls hormones to coincide with energy expenditure. The Master clock is the biological clocks in the brain, which keeps the the circadian rhythm synchronized. The suprachiasmatic nucleus, often known as the SCN, is a structure that makes up a group of roughly 20,000 nerve cells (neurons). It is largely affected by light. Direct input from the eyes is sent to the SCN, which is located in the hypothalamus region of the brain. With time, a person's sleep pattern develops and changes.



(Image credit: NIGMS)

Teenagers frequently stay up later than younger kids or adults because of this. As we age, we have a tendency to go to sleep and wake up earlier in the day.



Circadian Rhythm Sleep Disorder


Circadian rhythm sleep disorder has negative effects on the daily lives of people. People with CRSD will have trouble falling asleep and waking up at the normal times because their body thinks it should be sleeping at a time when they are awake, or vice versa. There are several different types of circadian rhythm sleep disorders, each with its own symptoms and characteristics. In general, most people with circadian rhythm sleep disorders have one or more of these symptoms:

· Difficulty going to sleep