the medical term opisthotonos (backward bending tone) means
Opisthotonus Opisthotonus or opisthotonos, from Greek roots, ὄπισθεν, opisthen meaning "behind" and τόνος tonos meaning "tension", is a state of severe hyperextension and spasticity in which an individual's head, neck and spinal column enter into a complete "bridging" or "arching" position.[1][2] This abnormal posturing is an extrapyramidal effect and is caused by spasm of the axial muscles along the spinal column.
Articulatory phonetics Consonants are produced with some form of restriction or closing in the vocal tract that hinders the airflow from the lungs. Consonants are classified according to where in the vocal tract the airflow has been restricted. This is also known as the place of articulation.