116 



Cerebrum and Cerebellum. 



Pyramis' 

 Canal. centrai-~^\s^\F un ic. gracil. 



457, Sag-ittal Median Section of the Cerebrum, 



Cerebellum and Medulla Oblongata. 2 / 5 natural size. 



In the Lamina cinerea white, transverse fibres, Chordae acusticae, are 

 seen (see Fig. 456), and along the clavae two bands, Tarmac fossae 

 rJiomboidcae. The posterior angle of the Fovca rhomboidea is called Calamus 

 Hcriptoriux : the anterior angle (covered by the anterior medullary velum) 

 communicates through the Aquacdudus /S'y/ivV with the third ventricle. The 

 lateral angles of the Fossa rliomlofdm form the lateral recesses, 

 Iicccssus later ales (see Fig. 450). The Lamina cinerca of the Fovea rJtom- 

 loidca presents at the place of exit of the Processus ccrebelll ad Coiyms 

 quadrigeminum an intensely dark color Locus cacrulcus. 



The fourth ventricle is closed posteriorly by the pia mater as 

 Tcla choroidca inferior, which, being fixed at the Tacm'ac, fossae rJiomboideae, 

 the peduncles of the flocculus and the posterior medullary velum, forms 

 the Plex/tx chorofdcus reittricnli quart i. 



In transverse section of the hemispheres of the cerebellum the 

 Nucleus dentatus .s. Corpus rhomboideum is seen in front ; it is a white nucleus 

 with dentated borders. 



