Stereotypic movement disorder
Medical condition / From Wikipedia, the free encyclopedia
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Not to be confused with Stereotypy.
Stereotypic movement disorder (SMD) is a motor disorder with onset in childhood involving restrictive and/or repetitive, nonfunctional motor behavior (e.g., hand waving or head banging), that markedly interferes with normal activities or results in bodily injury.[1] To be classified as SMD, the behavior in question must not be due to the direct effects of a substance, autism, or another medical condition.[1] The cause of this disorder is not known.[2]