1111 I] II!! 



bom . hi< li thus aids in f 



1 



The posterior surf the bo 



the occipital boi I young individuals, if 



rough and irregular. 



rhe greater portion of the lower surface of th 

 forms a boundary of the nasal fo 

 arc- also two .small sagittal gi lals, the inn< 



while the outer one, above which is th. 

 Fig. 54), is the pharyngeal canal Fig. ; 



The lateral sun od) of th( 



of the- sphenoid, while the pterygoid pr 

 bone. 



The lesser or orbital wings arc narrow, m th 



body of the sphenoid bone by t •. hich surround the 



upper surfaces form the posterior ]»<>rti<>n of the fl< the antcri 



41 and Fi{ and their posterior mar from the middli 



posterior margin of each wing terminates internally i int, th 



process, which partly overhangs the sella tu 1 the inferi 



sphenoidal (superior orbil sure and also aids in the I 



wings articulate anteriorly with the orbital plate of the frontal b 

 page 37 . and between the lesser and the greater wings there rem., 

 and narrowing toward its outer extremity, the spi 

 and 54 . [1 leads into the orbit and its 

 pass ' 1 the n< 1" the ocular muscles (the r, the 



to the first or ophthalmic division of the trigeminus, and 



The greater or temporal wings of the oid an 



body of the sphenoid by broad roots in which are situated tl 



the foramei nd the foramen spin* 51). Tl turn lea 



anteriorly through the bone into the sphenomaxillary 

 mils the maxillary nerve (the second division of the trigeminus . The 

 the bone in a vertical direction and make- 

 skull (see pag md Figs. ;i and ndibular n< 

 ^i the trigeminus . rhe foramen spinosum purs 

 the middle meningeal artery.* 



The greater wing, like the lesser one, is pr tal. b tly 



separated surfaces, the cerebral, the orbital, and t: 



,>;;/'.;/ border Fig. 51), the very rough margin din and tin 



* The greater wings have als sphe- 



noid by three n>ots, .1 middle broad root, situated between 1 

 between the foramen rotundum and the sphenoidal fis ramen c 



and spinosum. The latter, however. 



4 



