opisthotonus

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Related to opisthotonos: Risus sardonicus
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opisthotonus

[‚ap·əs′thät·ən·əs]
(medicine)
A condition, caused by a tetanic spasm of the back muscles, in which the trunk is arched forward while the head and lower limbs are bent backward.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The goats were unable to lift their heads and had opisthotonos, nystagmus, and bruxism.
perfringens types B and C in well-fed calves up to 1 month of age (acute diarrhea, dysentery, abdominal pain, convulsions, and opisthotonos resulting in death in a few hours or in less severe cases recovery over a period of several days); pig enterotoxemia is caused by Cl.
Immediate exchange transfusion is recommended in any infant who is jaundiced with signs of the acute bilirubin encephalopathy including hypertonia, arching, retrocollis and opisthotonos (head and heels drawn back), fever, and high-pitched cry--even if the bilirubin is decreasing (AAP, 2004) (see Table 4).
On March 30, Cal began exhibiting movements described as opisthotonos, arching, or hyperextension of the neck.
This kind of behavior, some of which resembled la grande hysterie of Charcot (even including opisthotonos, a characteristic distortion of bodily posture), continued until Robbie recovered, in the middle of April 1949.
Clinical signs consisted of vulvar hemorrhage in the does, epistaxis, ataxia, opisthotonos, diarrhea, ocular discharge, vocalization, and death.
(1) A person with tetanus experiences spasms of the muscles of mastication, (ie, trismus, or lockjaw) and of the back muscles (opisthotonos) (CENTERFOLD, FIGURE 3).