THE MAMMALIAN NERVOUS SYSTEM 



57 



60. Draw the median surface of the human brain (or of the 

 sheep's brain if the human specimen is not well preserved or not 

 cut in the exact median plane), paying particular attention to 



Thalarnus 



Fasciculus 

 gracilis 



Fasciculus 

 cuneatus 



Tsenia 

 thalami 



Habenula 



Corpus 



pineale 

 Corpus 



genicula- 



turn 



mediale 



Colliculus 

 superior 



Colliculus 

 inferior 



Brachium 



conjuncti- 



vum 

 Brachium 



pontis 

 Corpus 

 restiforme 

 Funiculus 



teres 



Ala cinerea 

 Trigonum 

 hypoglossi 



Clava 



Tubercu- 

 lum 

 cuneatum 



Tractus 

 spinalis 

 trigemini 



Tractus 



spinocere- 



bellaris 



dorsalis 



FIG. 11.- The dorsal surface of the medulla oblongata and midbrain of 

 the sheep. X 2. 



the extent and boundaries of the ventricles. Trace the ven- 

 tricular boundaries from the interventricular foramen (of 

 Monro) back to the central canal of the spinal cord. Note 

 especially the thin parts of the ventricular walls: lamina 



