\ \ \TiiMV IN A NUTSHELL. 



527 



the nasal fossa. Grooves, which articulate with the sphenoidal processes of 

 the palate bone, form the pterygo-palatine canals which are for the trans- 

 mission of the pterygo-palatine vessels and nerves. 



2. The greater wings of the sphenoid arise from the sides of the body and 

 curve upward, outward, and backward. Each greal wing has the following 

 points for consideration: (a) foramen rotundum for the superior maxillary 

 division of the fifth nerve, (b) foramen ovale or the inferior maxillary 

 division of the fifth nerve, the small petrosal nerve, small meningeal artery, 

 (c) foramen Vesalii transmits a small vein, tins foramen is often absent, (d) 

 foramen spinosum transmits the noddle meningeal artery, veins, and sympa- 

 thetic filaments from the cavernous plexus. This foramen is often double. 



PLATE CCLXXIII. 



ANASTOMOSIS OF UTERINE AND 

 OVARIAN ARTERIES. 



HELICINE BRANCHES 

 UTERO-OVARIAN LIGAMENT 



FIMBRIATED EXTRFMITY 

 OF TUBE 



MBRIA OVARICA 

 OVARIAN ARTERY. 



ILIAC INTERNAL 



VAGINAL BRANCHES 

 OS EXTERNUM 



The Uterus With Vagina Laid Open. 



The external surface of the greater wing is convex and is divided by the 

 transverse pterygoid ridge into an upper portion, and a lower portion. The 

 upper portion is larger and forms pari of the temporal fossa, and the lower 

 portion forms part of the zygomatic fossa. This lower surface ends posteriorly 

 in the spinous process, or spine, of the sphenoid. This process gives attach- 

 ment to the Tensor palati and internal lateral ligament of the lower jaw. 



The anterior or orbital surface of the greater wing of the sphenoid forms 

 pari of the outer wall of the orbit, and is quadrilateral in shape. The upper 

 border of this surface articulates with the frontal bone, the outer border with 

 the malar hone, and the lower border, which is rounded, helps to form the 

 pterygo-maxillary fissure, while the inner, which is sharp, forms the lower 

 border of the sphenoidal fissure (anterior lacerated). This surface has a notch 



