Method XX 129 



« 



above the roots of N. abducens. Will pass through the cere- 

 bellum, involving the cerebellar peduncles. 



Draw, illustrating the appearance and position of the follow- 

 ing structures : 



Fibrae- pontis superficiales, fasciculi pyramidales pontis, 

 lemniscus, fasciculus longitudinalis medialis, and raphe pontis, 



Radix vestibularis N. acusticae and nucleus N. vestibuli 

 lateralis (Deiter's nucleus). Look for a fiber tract passing from 

 Deiter's nucleus to the cerebellum by way of the corpus resti- 

 forme and connecting with the " roof nuclei " of the cerebellum. 



Fila radicularia N. abducentis and nucleus N. abducentis. 



Radix N. facialis (genu and pars secunda), colliculus faci- 

 alis, and nucleus N. facialis. 



Radix N. trigemini and nucleus sensibilis N. trigemini (sub- 

 stantia gelatinosa ?). 



Nucleus olivaris superior and corpus trapezoideum. 



Cerebellum : corpus resliforme, brachium pontis, and bra- 

 chium conjunctivum (superior cerebellar peduncle); lingula cere- 

 belli, vermis superior, corpus medullare, etc. 



What is the course of the radix N. facialis between its origin 

 in the nucleus N. facialis and its emergence on the ventral 

 aspect of the medulla oblongata ? Note the difference in the 

 positions of the nuclei N. facialis and N. abducentis. Why 

 has the radix spinalis N. trigemini increased in size ? What is 

 the office of the nucleus olivaris inferior ? Nucleus olivaris 

 superior? 



Section 10, to pass through the middle of the pons. 



Draw, giving special attention to the following structures : 



Fibrae pontis superficiales and profundae, fasciculi pyra- 

 midales pontis, and raphe pontis. 



Lemniscus medialis, lemniscus lateralis, fasciculus longitu- 

 dinalis medialis, radix descendens N. trigemini, radix N. troch- 

 learis, and decussatio Nn. trochlearum. 



Velum medullare anterius, ventriculus quartus (upper por- 

 tion), stratum griseum centrale, and substantia ferruginea. 



Cerebellum with brachium conjunctivum. 



Digitized by Microsoft® 



