OCCIPITAL BONE 



105- 



The Occipital bone consists of three parts arranged around 

 the foramen magnum a large hole for the passage of the spinal 

 cord. The posterior part is triangular in shape, the apex being 

 upwards, and is convex outwardly in both diameters. About the 

 centre of this surface is a tubercle the external occipital protu- 



Upper or Interparietal part 

 of Tabular Portion 



External Occipital Crest 1 ^External Occipital Protuberance 



Highest Curved Line", \ 1 / / Superior Curved Line 



^ Y / ^>^ 



Inferior Curved Line 



Lateral Angle 



Inferior Lateral 



Border of 

 Tabular Portion 



v Jugular Process 



Posterior Condylar Fossa and 

 Foramen (latter inconstant) 

 Anterior Condylar Foramen 



Pharyn?eal Tubercle on 

 Basilar Process 



FIG. 41. THE OCCIPITAL BONE. 



berance and from this curves out on each side the superior 

 curved lines; a short distance below are the inferior curved 

 lines. On each side of the foramen magnum are the condyles 

 for articulation with the atlas. They are large oval masses 

 of bone with an articulating surface convex in both directions - r 



