It was an ordinary night on the American University in Cairo's 20-year-old university student Salma, but it is a special, terrible night. She woke up and could not move not only himself, but also the feeling of the bedroom into the people, but also looks to see a canine grin, blood-stained creature, like a ghost horror movie stood out as her bedside.
She later studies of sleep paralysis researchers stated his experiences, sleep paralysis (also known as ghost press) is a common but a little hard to explain the phenomenon, referring to wake up sleeping people, but can not be moved feel. About 40 per cent said they had experienced sleep paralysis, the vague feeling anyone into the bedroom around them adrift.
University of California, San Diego (UCSD) neuroscientists Baland Jalal said: "For some people, sleep paralysis is very terrible, this phenomenon has a clear understanding of the people who suffer it is necessary."
According to the researchers, sleep paralysis usually occurs in so-called "rapid eye movement (REM)" stage of sleep. At this stage it is possible to adapt, people will want to break free from a dream.
There is a possible explanation: the illusion of the brain sort out the confusion of thinking. This is caused by Jalal and his colleagues at UCSD recently published together in "Medical Hypotheses" (Medical Hypotheses) on the article.
Jalal said: "Perhaps, in a certain area of the brain with physical template." From previous studies, this area may parietal lobe, located just on top of the brain.
Possible during sleep paralysis, limb movement command monitors the parietal brain nerve issue, but did not actually move the limb is temporarily paralyzed. And when the brain tries to build his body model gave rise to the so-called "bedroom intruder" illusion.
However, Jalal pointed out that although the feeling is likely this hypothesis, it is difficult to test scientific. One way is to have a different body image of the person tested. If this assumption is true, mutilated objects may fantasize about a similar lack of this part of the figure. But mutilated people are just a small part, it is difficult to arrange such experiments.
Sleep paralysis Why so terrible?
However, there may be due to differences in cultural attitudes lead to sleep paralysis experiences are not the same. Previous studies have shown that certain culture can shape what they see during sleep paralysis illusion.
For example, research in 2013 Jalal scholar at Harvard Medical School and had worked together: the two different social experiences of people in Denmark and Egypt and the probability of sleep paralysis caused by pressure. It was found, and the Danish study compared the Egyptians more frequent sleep paralysis, paralysis time longer, and the fear of death is greater. These two countries have very different cultures, Egypt is very religious, while Denmark is the world's most atheist country.
Most said they thought the object Denmark during sleep paralysis physiological factors may be brain malfunction or sleeping the wrong way. The Egyptians are more inclined to think that sleep paralysis is caused by supernatural factors.
In another survey, the object of study in Egypt, half said they sleep paralysis phenomenon is because Islamic mythology evil spirits dirty tricks.
Jalal think this supernatural faith in people experiencing sleep paralysis when fear will be more time will be longer than the average person. Perhaps even because of the fear of spirits that led to their frequent and serious phenomenon of sleep paralysis. Jalal said, with the words: "If you have fear (of something), activate the fear center in the brain may be completely paralyzed half sleep wake the sleeping state, more complete control of the process through fear but because sleep paralysis. you will become more fear, coupled with your belief, culture, thought it was haunted by what supernatural things, so you have to fear to be added. "
(Translation: via YAHOO)
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