Injury of the anterior longitudinal ligament

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3468039/

AMA Guidelines for 25-28% whole person impairment = Motion segment integrity is defined from flexion and extension radiographs as at least 3.5mm of translation of one vertebra on another, or angular motion of more than 11 degrees greater than at each adjacent level.