358 



ANATOMY IN A NUTSHELL. 





The central fibres of each tract are continued into the optic nerve of the opposite 

 side, decussating in the commissure with similar fibres of the opposite tract. 

 The ventricles arc two lateral, third ventricle, fourth ventricle, 



FIFTH \ ENTRICLE, and THE VENTRICLE OF THE CORPUS CALLOSUM. 



The lateral ventricles arc found one in each hemisphere; they communicate 

 with each other and with the third ventricle through the foramen of Monro. 



PLATE CLXXVIII. 



NINTH 

 TENTH 



AND ELEVENTH 



LIGAMENTMM DENTICULATUM 



Showing Falx Cerebri, Etc. 



The third ventricle lie- between the optic thalami. It communicates with the 

 fourth ventricle through the aqueduct of Sylvius. The fourth ventricle/lies 

 between the cerebellum and the pons and medulla. The so-called fifth ven- 

 tricle, (n- pgeudocele, has no connection with the other cerebral ventricles, being 

 of a different nature and simply a small interval between the right and left 

 layers of the septum lucidum. 



