Hyperextension Dislocation Injury

- Discussion:
    - hyperextension dislocation type of injury of Cervical Spine may be assoc w/ marked neurologic deficit - esp Central Cord Syndrome;
    - cervical cord is compressed between posteriorly dislocated vertebral body and the posterior longitudinal ligament, & posterior 
          elements and ligamentum flavum;
- Radiographs:
    - combination of prevertebral soft tissue swelling in association w/ normal alignment of C-spine suggests hyperextension dislocation;
    - contralateral facet subluxation & anterolisthesis suggest hyperextension frx dislocation;
    - may see avulsion frag from antero-inferior end plate of dislocated body;
    - transverse diameter of the fragment typically is > vertical ht;
    - vacum disc or widening of the intervertebral disc space;
    - unilateral articular mass frx are seen on AP film as disruption of undulating lataeral margin;
    - lateral film:
         - as disruption of Facet Joint;
    - oblique film:
         - facet frx lines as well as facet disarticulation

Hyperextension-dislocation of the cervical spine. Ligament injuries demonstrated by magnetic resonance imaging.

Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Thursday, December 22, 2011 12:32 pm