A classical sign of Tetanus, risus sardonicus is a form of facial dystonia producing a fixed smiling or grinning expression.
Risus sardonicus or rictus grin is a highly characteristic, abnormal, sustained spasm of the facial muscles that appears to produce grinning. It may be caused by tetanus,[1][2] strychnine poisoning, or Wilson's disease, and has been reported after execution by hanging.[medical citation needed]
The condition's name, associated with the Mediterranean island of Sardinia, derives from the appearance of raised eyebrows and an open "grin", which can appear sardonic or malevolent to the lay observer, displayed by those experiencing these muscle spasms.
^"Tetanus: Clinical Presentation". Medscape.
^Kobayashi, A.; Iwasaki, H. (2017). "Tetanus attacks an old person with inadequate vaccination showing 'Risus Sardonicus' face". IDCases. 10: 38–39. doi:10.1016/j.idcr.2017.08.009. PMC 5577402. PMID 28875124.
Risussardonicus or rictus grin is a highly characteristic, abnormal, sustained spasm of the facial muscles that appears to produce grinning. It may be...
may cause a characteristic expression called Risussardonicus (from the Latin for scornful laughter) or Risus caninus (from the Latin for doglike laughter...
also affect the facial muscles, resulting in an appearance called risussardonicus. Chest, neck, back, abdominal muscles, and buttocks may be affected...
popular press as the "laughing sickness" because some patients displayed risussardonicus as a symptom. He lived among the Fore, studied their language and culture...
"Polyacetylenes from Sardinian Oenanthe fistulosa: A Molecular Clue to risussardonicus". Journal of Natural Products. 72 (5): 962–965. doi:10.1021/np8007717...
Rictus may refer to: Risussardonicus (or rictus grin), a spasm of the facial muscles Rictus (bicosoecid), a genus of flagellates Rictus Erectus, a fictional...
metoclopramide.[citation needed] Opisthotonus with the presence of the risussardonicus is also a symptom of strychnine poisoning and prussic acid (hydrogen...
spasm, starting with the head and neck in the form of trismus and risussardonicus. The spasms then spread to every muscle in the body, with nearly continuous...
ingested the plant when executed. A common symptom of oenanthotoxin is risussardonicus, better known as the Sardonic Grin, coined by Homer in the 8th century...
Hippocrates. Hippocratic Corpus and Hippocratic Oath are also his namesakes. Risussardonicus, a sustained spasming of the face muscles may also be termed the Hippocratic...
unopposed muscle contraction and spasm. Characteristic features are risussardonicus (a rigid smile), trismus (commonly known as "lock-jaw"), and opisthotonus...
leukocytosis (high number of white blood cells), trismus (lockjaw), risussardonicus (spasm of the facial muscles), and opisthotonus (dramatic spasm of...
"Polyacetylenes from Sardinian Oenanthe fistulosa: A Molecular Clue to risussardonicus". Journal of Natural Products. 72 (5): 962–965. doi:10.1021/np8007717...
was re-recorded and re-released via Paragon Records, while their demo, Risus Ex Mortuus, was re-recorded and re-released as a full-length album in 2006...
"Polyacetylenes From Sardinian Oenanthe fistulosa: A Molecular Clue to risussardonicus". Journal of Natural Products. 72 (5): 962–965. doi:10.1021/np8007717...
mystical style, contains a eulogy of the Virgin, has had three editions; Risussardonicus, hoc est deflecta mundi laetitia (Verona, 1630, 12mo); Schediasmata...
them (2013), ISBN 978-0-9856479-9-5 The Reason of Unreason (and the RisusSardonicus of Rationality (2013), ISBN 978-0-9856479-8-8 Hermeneutic Pedagogy:...
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