Sleep inversion

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Sleep inversion or sleep-wake inversion is a reversal of sleeping tendencies. Individuals experiencing sleep-wake inversion replace diurnal habits for nocturnal habits, meaning they are active at night and sleep during the day. Common symptoms of sleep inversion include persistent wakefulness during night time hours and excessive sleepiness during the day. Sleep-wake inversion is an individual symptom, not a condition by itself. It can be due to many reasons, with the main two being circadian rhythm disorders and encephalopathies. Individuals with the delayed sleep phase type of the disorder exhibit habitually late sleep hours and an inability to change their sleeping schedule consistently. They often show sleepiness during the desired wake period of their days. The sleep phase cycles may or may not be impaired depending on the underlying cause. For example, synucleinopathies such as MSA are known for causing REM issues alongside other sleep impairments. Severe cases of delayed sleep phase...

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