Maybe
you've felt the sensation of panic during sleep because the body as if
crushed something but you can not move, shout, let alone built. Society calls for squeezing phenomenon as spirits.According to a medical explanation, squeezing called paralysis during sleep (sleep paralysis). This is a normal phenomenon. Almost every person in his life experienced during sleep paralysis, including those from developed countries.Paralysis
during sleep, according to the explanation dr.Rismawati Tedjakusuma,
neurologist and sleep expert, due to a mismatch between REM sleep to
waking.REM sleep is the deepest sleep periods of deep sleep. At this stage the dream happen. During REM sleep the muscles are in a very weak condition. "This is a natural mechanism that we do not act out the dream is experienced," he said.