128 Neurological Technique 



Draw, giving special attention to the following structures : 



Pyramis, lemniscus, decussatio lemniscorum, fasciculus longi- 

 tudinalis, fibrae arcuatae internae and externae, nucleus olivaris 

 inferior and olivaris accessorius, and corpus restiforme. 



Ventriculus quartus with tela choroidea ventriculi quarti. 



Fila radicularia N. hypoglossi and nucleus N. hypoglossi. 

 Radix spinalis N. trigemini (ascending root of Vth nerve), sub- 

 stantia reticularis grisea, and tractus solitarius. 



What has become of the funiculi posteriores (gracilis and 

 cuneatus) ? What is the destination of the corpus restiforme ? 

 What is the tractus solitarius ? In the section of the cerebellum, 

 note gyri and sulci cerebelli, substantia corticalis, and laminae 

 meduUares. 



Section 8, to pass through the upper extremity of the oliva 

 and through the lower border of the entering roots of the N. 

 acusticus. The plane will pass near the middle of the cerebel- 

 lar hemisphere. 



Draw, paying special attention to the following structures : 



Pyramis, lemniscus, fasciculus longitudinalis, fibrae cerebello- 

 olivaris (arcuatae), corpus restiforme, and nucleus olivaris 

 inferior. 



N. acusticus: radix cochlearis, nucleus ventralis, and striae 

 meduUares (striae acusticae); radix vestibularis and nucleus 

 dorsalis. 



Fila radicularia N. glossopharyngei (?), nucleus N. glosso- 

 pharyngei, tractus solitarius, and radix N. trigemini with sub- 

 stantia reticularis grisea. 



Cerebellum : sulci and gyri cerebelli, vermis superior and 

 uvula vermis ; corpus dentatum, corpus meduUare, laminae 

 meduUares, and substantia corticalis. 



What changes are to be noted in the general shape of the 

 section of the medulla oblongata? Compare the pyramis here 

 with that in Section 6. Explain the increase in the size of the 

 corpus restiforme. What becomes of the auditory fibers con- 

 tained in the striae meduUares? What is the nucleus dentatus ? 

 Section g, to pass through the lower border of the pons just 



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