As sleep time drifts later, you do not fall asleep until morning. Light is the major influence on resetting the brain’s clock.Īs your sleep pattern drifts a little later every day, N24SWD can be confused with other circadian rhythm disorders. This is why many people who are blind have N24SWD. Without light and this clock resetting, people’s sleep time will drift later and later. Every day, morning light and other behaviors reset the sleep-wake clock to a 24-hour schedule. Normal people have a circadian rhythm that is slightly longer than 24 hours. Sleep times go in and out of alignment with other people as weeks go by. Sleep time and wake up time continue to move later and later every day.
The sleep time of people who have N24SWD shifts a little later every day.
Their sleep patterns do not follow the “normal” sleep times at night.
People with these disorders have sleep times that seem to be out of alignment. Non-24-hour sleep-wake rhythm disorder (N24SWD) is one of several circadian rhythm disorders.
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