<prompt> Hangmans fracture is a fracture of which cervical veebra?C1C2C3None of the above  <response>: Traditionally considered a hyperextensiondistraction injury from placement of the noose under the angle of the jaw, hangmans fractures also may occur with hyperextension compression, as with diving accidents, or hyperflexion. The injury is defined by bilateral C2 pars interaicularis fractures. The pars interaicularis is the bone between superior and inferior facet joints. Thus, the posterior bony connection between C1 and C3 is lost. Ref: Schwazs principle of surgery 9th edition, chapter 42. 