<prompt> Which of the following is not true about jeffersons fracture?It is a burst fracture of the ring of atlas veebraIt is the most common type of atlas fractureFracture definition is paicularly clear on CT scan imageIt is associated with injury elsewhere in spine in 25 of the cases.  <response>: Fracture of atlas are associated with injury elsewhere in cervical spine in upto 50 of cases; odontoid fractures and hangmans fracture in paicular should be excluded. Other optionsare correct. 