Classification Description Notes
Type 1 Head displaced anteriorly  
Type 2 Distraction  
Type 3 Head displaced posteriorly  

 

Reference:

 

Traynelis VC, Marano GD, Dunker RO, Kaufman HH. Traumatic atlanto-occipital dislocation. Case report. Journal of neurosurgery. 1986;65(6):863-70.