Kalmar “opisthotonos” tana nufin wani yanayi na rashin lafiya da ke tattare da matsananciyar matsananciyar tsokanar tsokar baya, yana haifar da kai da dugadugansa sunkuyar da kai a baya kuma jiki ya yi gaba. Sau da yawa ana danganta shi da yanayi kamar meningitis, tetanus, da sauran cututtukan jijiyoyin jijiya.
