310 



HUMAN ANATOMY. 



the other roots of the tract, and external from the middle lobe; 

 deep origin, from gyrus fornicatus, uncinate gyms of limbic 

 lobe; course, roots unite, pass forward, and form bulbus olfac- 

 torius (from this the olfactory nerves are given off) ; exit, fora- 

 mina of cribriform plate of ethmoid; distribution, by three 



13 



FIG. 142. 



Base of brain and cranial nerves: 1, olfactory bulb; 2, optic 

 nerves; 4, tractus opticus; 5, crus cerebri; 6, third pair of nerves; 

 7, fourth pair of nerves; 8, fifth pair of nerves; 9, sixth pair of 

 nerves; 10, pyramid; 11, olivary body; 22, pons Varolii; 24, seventh 

 and eighth pairs of nerves; 25, ninth, tenth, and eleventh pairs of 

 nerves; 26, twelfth pair of nerves; 27, cerebellum. 



groups to mucous (Schneiderian) membrane of nares, inner 

 to septum nasi, middle to roof of nasal fossa, outer to superior 

 turbinated bone. 



