BASE OF BRAIN 



453 



their connections with the columns of the fornix will be 

 displayed 



Tuber Cinereum. This is a slightly raised field of grey 

 matter which occupies the interval between the corpora 



Optic chiasma 



Infundibulum 



Co 



mamillaria 



Abducent 

 nerve 



Hypoglossal 

 nerve 



Olfactory bulb 



Olfactory tract 



Optic nerve 



Substantia perf< 

 ata anterior 



Optic tract 



Motor root of 

 facial nerve 



Acustic nerve 



Sensory root oi 

 facial nerve 



Glosso-pharyngeal 

 nerve 



Pyrami 

 Spinal medulla (cut) 



Vagus nerve 

 Accessory nerve 

 Hypoglossal nerve 



FIG. 182. The Base of the Brain with the Cerebral Nerves attached. 



mamillaria posteriorly, the optic chiasma anteriorly, and the 

 optic tracts laterally. Springing from the anterior part of the 

 tuber cinereum, immediately posterior to the optic chiasma, 

 is the infundibulum or stalk of the hypophysis. In the 

 ii 29ft 



