Method XX iig 



Fissura longitudinalis cerebri, fissura cerebri lateralis (Sylvii), 

 and polus temporalis. 



Hypophysis, infundibulum, and tuber cinereum. 



Corpora mamillaria, pedunculi cerebri (Crura), and fossa 

 interpeduncularis. 



Pons (Varoli), sulcus basilaris, and brachia pontis. What is 

 the relation of the pons to the cerebellum ? 



On the medulla oblongata' note the pyramides, decussatio 

 pyramidum, foramen caecum, and fissura mediana anterior. 

 Olivae and sulci laterales and anteriores. On the lateral aspect 

 note corpus restiforme and funiculus lateralis. What is the 

 relation of the corpus restiforme to the cerebellum and medulla 

 spinalis ? Note fibers crossing the corpus restiforme transversely 

 (fibrae arcuatae externae), giving it the appearance from which 

 it derives its name. Whence come these fibers ? 



Identify the twelve pairs of nervi cerebrales, giving special 

 attention to the distinguishing peculiarities of each. 



I. Olfactory. On the ventral surface of the frontal lobe, 

 and lying in the sulcus olfactorius, are the buibus olfactorius 

 and tractus olfactorius. Note trigonum olfactorium with its 

 striae medialis, intermedia, and lateralis. The Nn. olfactoril 

 proper arise in the nasal epithelium (Regio olfactorii nasi) and 

 terminate in the buibus olfactorius. 



II. N. Opticus, passing from the buibus oculus (removed) 

 to the chiasma opticum, thence the tractus opticus, passing 

 around the pedunculus cerebri to the thalamus opticus and 

 mesencephalon. 



III. N. Oculomotorius, emerging through the substantia 

 perforata posterior in the fossa interpeduncularis, and resting in 

 the sulcus N. oculomotorii. 



IV. N, Trochlearis, small nerve arising from the dorsal aspect 

 in the region of the inferior coUiculi of the corpora quadri- 

 gemina, and emerging along the anterior border of the pons. 



'The medulla oblongata (myelencephalon) extends from the posterior border of 

 the pons down to and including the decussatio pyramidum. Beyond this is medulla 

 spinalis. 



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