98 



LECTURES ON THE CENTRAL NERVOUS SYSTEM. 



direct continuation of the internal capsule. After passing back- 

 ward a short distance, the pedunculus cerebri is covered in by a 

 thick mass of fibres, which appear to run transversely across it 

 from one-half of the cerebellum to the other. These are called 

 the fibres of the pons (fibrse pontis). 



Cerebellum 



Central 



Kanal 



FIG. 56. 



Sagittal section through the inter-brain and the structures lying back of it, exactly 

 in the middle line. The course of many fibres of the corona radiata is indicated by 

 lines. 



Central Kannl, Central canal. Pi/ramitlpn Fasern, Pyramidal fibres. 



ITniibf, Tegmentum. Pi/ramidnn&reHznng, Pyramidal deeussation. 



Haubenstruhlung, Tegmental radiation. Zit ilm Opticuscentren, To the optic nuclei. 



Zur BriHce, To the [ions. 



Below the pons a portion of the fibres of the peduncle 

 again comes into view, forming the pyramids. Another portion 

 of the peduncular fibres terminates in ganglia which are located 

 among the fibres of the pons. 



The gray matter between the crura cerebri is called the sub- 

 stantia perforata posterior. Internally, it borders on the sub- 



