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Related to opisthotonos: Risus sardonicus
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  • noun

Words related to opisthotonos

severe spasm in which the back arches and the head bends back and heels flex toward the back

References in periodicals archive ?
Five hours after ingestion, the goats developed clinical signs characterized by restlessness, shrill bleating, profuse regurgitation, colic, looking and kicking at the flank, a loss of balance, irregular gait, staggering, and opisthotonos. The following morning, five of the eight animals had died.
Signology was characterized by anorexy, diarrhea, dehydration, muscular tremors, wobbly march, sternal or lateral decubitus, pedalling, opisthotonos, dyspnea and death.
The term has also been used to identify the acute clinical, often fatal, condition in the severely jaundiced newborn characterized by convulsions, opisthotonos, hypotonia, high-pitched cry, and fever.
With severe trismus there is opisthotonos, caused by generalized spasm and resulting in flexion of the arms, extension of the legs and rigidity of the abdominal wall, followed by rigidity of the trunk and limbs (4).
Finally, "Appendix 4--Some unacceptable agents and methods of euthanasia," lists agents or methods along with comments as to why the agent is unacceptable, such as: "Air embolism may be accompanied by convulsions, opisthotonos [a muscle spasm causing the head, neck, and spine to be arched backwards], and vocalization.
* Sheep, goats, and pigs present with similar signs to horses and often fall to the ground and exhibit opisthotonos when startled.
A person with tetanus experiences spasms of the muscles of mastication (ie, trismus, or lockjaw) and of the back muscles (opisthotonos).
Printed on the outside of the same panel, a contemporary acrobat summersaults in an inverted opisthotonos posture, a pose symbolizing an ecstatic trance often depicted in ancient Egyptian tomb reliefs; this orientation of the rainbow-color acrobat serves to re-circulate the flow of the repeated images of Nut upward to merge with the depiction of Sky Goddess overhead.
At high doses, signs of poisoning attributable to type II pyrethroids include profuse salivation and pulmonary edema, clonic seizures, opisthotonos (i.e., the spine is bent forward such that a supine body rests on its head and heels), coma, and death (4,5).