Risus Sardonicus
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Risus Sardonicus

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High Quality Content by WIKIPEDIA articles! Risus sardonicus is a highly characteristic, abnormal, sustained spasm of the facial muscles that appears to produce grinning. The name of the condition derives from the appearance of raised eyebrows and an open "grin" - which can appear malevolent to the lay observer - displayed by those suffering from these muscle spasms. It is most often observed as a sign of tetanus. Poisoning with strychnine may result in a risus sardonicus. In 2009 scientists at the University of Eastern Piedmont in Italy claimed to have identified hemlock water dropwort (Oenan...