What is sleep paralysis, and is it rare?
—Mark Fischetti, Lenox, Mass.
Psychologist Christopher French of Goldsmiths College in London explains:
Attacks by demons, ghostly visitations and alien abductions: some people are certain they have experienced such paranormal events. In reality, many of these victims probably had an episode of sleep paralysis.
Sleep paralysis, a momentary inability to move one’s limbs, trunk and head despite being fully conscious, may occur when someone is either drifting off or, more rarely, waking up. During rapid-eye-movement (REM) sleep, the muscles of the body are paralyzed, presumably to prevent the dreamer from physically acting out the dream. Researchers are not sure why this normal paralysis happens during consciousness for victims of sleep paralysis, but psychophysiological studies have confirmed that attacks are particularly likely to occur if the person enters REM sleep quickly after hitting the pillow, bypassing the stages of non-REM sleep that usually happen first.
Other factors that make sleep paralysis more likely to occur include drifting off while lying on the back, feeling stressed or experiencing a disruption in normal sleep patterns, such as from shift work, jet lag, caffeine or alcohol.
Although sleep paralysis is a symptom of narcolepsy, it is also common in healthy people. Surveys from different countries show a wide range of estimates: 20 to 60 percent of the normal adult population has experienced sleep paralysis at least once. Around 5 percent of the population has experienced one or more of other disturbing symptoms associated with the disorder. The most common effects include visual hallucinations, such as shadows and light or a human or animal figure in the room, and auditory hallucinations, such as hearing voices or footsteps. A person often also feels pressure on his or her chest and has difficulty breathing.
Hmmmm.
He concludeds that it is a disorder.
I dissagree.
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