Hypersomnia

Definitions of hypersomnia

noun
an inability to stay awake

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antonyms:
insomnia
an inability to sleep; chronic sleeplessness

types:
catalepsy
a trancelike state with loss of voluntary motion and failure to react to stimuli

narcolepsy
a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep

type of:
sleep disorder
a disturbance of the normal sleep pattern

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