Parasomnia: Sleep terrors are episodes of screaming, intense fear and flailing while still asleep. Also known as night terrors, sleep terrors often are paired with sleepwalking. Like sleepwalking, sleep terrors are considered a parasomnia - an undesired occurrence during sleep. In some cases odd movements occur. A person may lie flat, lift the head or upper body, and then forcefully hit his or her head on the pillow over and over. This in particular is called rhythmic movement disorder, which also has been called "head banging," also can involve movements such as rocking on hands and knees. The disorder usually occurs just after a person falls asleep.All Rights Reserved
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