

10_> LHAHD1300K OF ANATOMY 



the malar articulates with a process of the temporal. Between 

 this process and the opening of the ear is the articulation of 

 the mandible. 



Norma Oceipitalis (the back view of the skull) shows the 

 rounded shape of the back of the head and the joints of the 

 occipital and parietal bones, called the lambdoid suture. 



Norma Vertiealis (the view of the skull from above). This 

 varies very much with different individuals, and may be nearly 

 circular or a long oval. The T-shaped sutures of the large 

 bones forming the vault is seen : the two parietal bones join in 

 the middle line ; and anteriorly, where the parietals join the 

 frontal, and posteriorly, where the parietals join the occipital, 

 are situated the openings called the anterior and posterior 

 fontanelles, found on the head at birth. These are due to the 

 ossification of the several bones not being complete. 



Norma Basalis (the view of the base of the skull, without the 

 mandible). In front is seen the row of upper teeth, between 

 them being the processes of the maxillae forming the roof of the 

 mouth. Behind this is the sphenoid bone which, as it were, bolts 

 together the whole skull underneath. The pterygoid plates, 

 two on each side, hang down for the attachment of muscles, 

 and the great wings of the sphenoid pass out on each side to 

 articulate with the temporal bones. Articulating with the body 

 of the sphenoid bone is the basilar process of the occipital bone, 

 and behind this is seen the opening for the passage of the 

 spinal cord. On each side of the opening are the prominent 

 articular facets for articulation with the first vertebra. There 

 are numerous foramina on the base of the skull for the passage 

 of the cranial nerves. 



The Frontal bone consists of three parts : a frontal part, 

 forming the forehead; an orbital part, forming the upper 

 margins of the eye-sockets; and a nasal part which helps to 

 form the bridge of the nose. 



The frontal part is convex in both its diameters, most marked 

 just above the orbital margins. 



The orbital part consists of the two rounded margins, separated 

 from one another by the nasal notch. At the inner third of the 

 margin is a deep groove, or may be a foramen, for the passag'e of 



