Demonic Visitation explained

I used to hear about such things called gui3 ya1 chuang2 or demonic visitations, especially on Taiwanese variety shows. They make it sound so scary, but i never knew what they meant, until i experienced it for myself--not so coincidentally in Taiwan. It was scary.. really.. but i am not one who believes in such things, but prefers to take things from a scientific point of view. Indeed, there is a scientific explanation behind what many cultures have long thought to be a demonic/spiritual attack.

For those who dunno what i am describing, "Sleep paralysis is a condition characterized by temporary paralysis of the body shortly after waking up or, less often, shortly before falling asleep. Sleep paralysis occurs when the brain awakes from a REM state, but the bodily paralysis persists. This leaves the person fully aware, but unable to move. In addition, the state may be accompanied by hallucinations.

More often than not, sleep paralysis is believed by the person affected by it to be no more than a dream. This explains many dream recountings which describe the person lying frozen and unable to move. The hallucinatory element to sleep paralysis makes it even more likely that someone will interpret the experience as a dream, since completely fanciful, or dream-like, objects may appear in the room alongside one's normal vision. Some scientists have proposed this condition as a theory for alien abductions and ghostly encounters.

Sleep paralysis occurs during REM sleep, thus preventing the body from manifesting movements made in the subject's dreams. Very little is known about the physiology of sleep paralysis. However, some have suggested that it may be linked to post-synaptic inhibition of motor neurons in the pons region of the brain. In particular, low levels of melatonin may stop the depolarization current in the nerves, which prevents the stimulation of the muscles, to prevent the body from enacting the dreamt activity (e.g. preventing a sleeper from flailing his legs when dreaming about running).

Several studies have concluded that many or most people will experience sleep paralysis at least once or twice in their lives.

During paralysis episodes, patients may be advised to try moving the facial muscles and moving eyes from one side to the other. This may hasten the termination of the attack."

For more information, visit wikipedia