Lewis Short
ŏpisthŏtŏnĭa (noun F) = ὀπισθοτονία:
* A disease in which the head is drawn backwards, opisthotony (post-class.); opp. emprosthotonia, in which the head is drawn forwards,Cael. Aur. Acut. 3, 6; cf. Hier. Ep. ad Ephes. 6, 4; v. opisthotonos.
Charlton T. Lewis, Charles Short, A Latin Dictionary