THE AXIAL SKELETON 



Posterior tubercle 



Tuberculum posterius- 



Vertebral groove 



Sulcus arteriae vertebralis -- 



Posterior arch 



Arcus posterior 



Lateral mass 



Massa lateralis 



Superior articular facet 

 Fovea articularis superior 



Articular facet for the odontoid process 

 Fovea dentis 



.,, Anterior arch 

 ""Arcus anterior 

 Anterior tubercle 



Tuberculum anterius 



FIG. 53. THE ATLAS, OR FIRST CERVICAL VERTEBRA. SEEN FROM ABOVE. 



Anterior articular facet 

 Facies articularis anterior 



Odontoid process 

 Dens 



Superior articular process 

 Processus articularis superior 



- Inferior articular process 

 Vi Processus articularis inferior 



FIG. 54. EPISTROPHEUS, THE Axis, OR SECOND CERVICAL VERTEBRA. SEEN FROM BEFORE. 



Spiuous process 

 Processus spinosus 



Inferior articular process 



Processus articularis inferior 



Superior articular process 

 Processus articularis superior 



Posterior tubercle 

 Tuberculum posterius 



Spinal foramen 

 Foramen vertebrale 



Costo-transverss foramen 

 Foramen transversarium 



FIG. 55. VERTEBRA CERVICALIS VII. SEVENTH CERVICAL VERTEBRA. SEEN FROM ABOVE. 



Vertebrae: The atypical cervical vertebrae. 



