428 



THE BRAIN 



in opening up the inferior horn. Place the point of the knife 

 in the upper part of the horn, where it joins the central part 

 of the ventricle, and carry the blade forwards and downwards, 

 through the lateral part of the temporal lobe, towards the 



Genu of corpus callosum 



; foramen mterventnculare 

 Cavum septi pellucidi I | Caudate nucleus 

 Thalamus 

 Septum pellucidum Chorioid plexus 



Stria terminalis 



Trigonum collaterale 



Hippocampus 



Crus of forni 



Calcar avis 



Forceps major 



Body of fornix 



Bulb of cornu 

 Hippocampus 



Crus of fornix 



FIG. 164. Dissection to show the Lateral Ventricles. The trunk of the 

 corpus callosum has been detached from the genu and the splenium and 

 turned over to the left. 



temporal pole, following the course of the cavity, which corre- 

 sponds, very nearly, with the course of the superior temporal 

 sulcus. The lateral wall of the inferior horn is thus incised, 

 and a sufficient amount of the lateral part of the temporal lobe 



