Congenital central hypoventilation syndrome ore CCHS is an extremely rare condition. Some consider it to be one of the most horrific condition a human being could ever suffer from. The reason is that each and every time you fall asleep could be your last. The condition refers to a sudden stop of all respiratory functions while a person is deep asleep. More simply put the brain just forgets to tell the lungs to breathe.
Another famous appellation of the congenital central hypoventilation syndrome is Ondine’s curse. It’s derives from the ancient German folklore. It was when the famous nymph Ondine falls deeply in love in a mere mortal man. When the mortal man cheats on his beloved nymph he gets cursed by the king of the nymphs. The curse makes the mortal having to remember all important bodily functions. But when he falls asleep he forget.