<prompt> Jeffersons fracture is a fracture of the following veebra:C 1C 2T 1None of the above  <response>: Jefferson fracture is a bursting fracture of the ring of C1 the atlas due to compression forces. There are usually two or more fractures through the ring of C1. The open-mouth odontoid view may show lateral dislocation of the lateral masses of C1. The rule of Spence states that 7 mm or greater combined dislocation indicates disruption of the transverse ligament. The transverse ligament stabilizes C1 with respect to C2. Jefferson fractures dislocated Ref: Schwazs principle of surgery 9th edition, chapter 42. 