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head banging |
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head banging, a form of physical exertion observed during some temper tantrums. It usually occurs near the peak of excitement and may be associated with other physical or muscular movements. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In humans, the mutated HPRT gene causes Lesch-Nyhan syndrome, characterized by mental retardation and self-mutilation, including finger biting, eye gouging and head banging. |
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