opisthotonos

1. Tactile and auditory stimuli provoke convulsions with opisthotonos.
   触觉和听觉的刺激可诱使病牛惊厥和角弓反张。
2. There were the desquamate symptoms in the back of new-born rats in suramin and s+ r groups and the opisthotonos in suramin and s+ r groups with different degrees.
   suramin组和suramin+raFGF组幼鼠背部有皮屑现象，出现不同程度的角弓反张症状。

noun

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