120 



Fibres of the Brain. 



Crurct ant: 

 Jbrnic. 



Comissura 

 poster. 



JBracli. post. 

 Corp. rtuadrig 



Cru.S crrebelli 

 ad cerebr. 



Cfrus ccrclellt 

 ad pontem 



Pcdunc. cereb. 



Fovea 

 liofnbo'id. 



Funic. leres 

 Funic. cuneat. 



Funic. gracil. 

 Nedalla oblong. 



404. The Fibres of the Truncus Cerebri.* 



View from above. Natural size. 



The grey substance of the brain and spinal cord consists 

 principally of ganglion cells. In the spinal cord it forms the nucleus, 

 is continued along the floor of the III. and IV. ventricles up to the 

 Tuber clnereum and Tnfundtljulum., forms a layer on the convolutions of 

 the cerebrum and cerebellum, finally separate grey masses so-called nuclei; 

 such nuclei are the grey masses of the olivary bodies, of the hemispheres 

 of the cerebellum, the Corpora quadrigemina, the optic thalami and Corpora 

 fitriata, the Ponx Varolti, then the Tuber chiereiun of the restiform bodies, the 

 lenticular nucleus, the claustrum and amygdalae of the cerebrum. 



The three pairs of columns of the cord are continued 

 into the Medulla oblortf/ata as pyramids, olivary bodies and restiform 

 bodies, the lateral columns becoming the pyramids, the anterior the 

 olivary bodies, and the posterior the restiform bodies. The pyramids are 

 continued upwards into the Pcdiinculi ccrelri, the olivary bodies run to 

 the Corpus quadriycminum and the restiform bodies form the Peduncull 

 cerebcllL 



8ee note, page 122. 



