THE CEREBRUM 



487 



horns diverge from the posterior end of the central part. 

 The posterior horn curves posteriorly and medially into the 

 occipital lobe. It is very variable in its length and capacity. 

 The inferior horn passes with a bold sweep round the 

 posterior end of the thalamus, and then tunnels, in an antero- 

 inferior direction, through the temporal lobe towards the 

 temporal pole. 



Corpus callosum 

 Longitudinal fissure 



, , -^^~ ~ x Claustrum 



Lateral ventricle 



Chorioid plexus j \^ Internal capsule 



Interventricular forameu \ \ L ent iform nucleus 



Right column of formx \ Caudate nucleus 



Septum pelluciduru 



FIG. 197. Frontal section through the Cerebrum through the anterior part 

 of the lentiform nucleus. Seen from the anterior aspect. 



Cornu Anterius Ventriculi Lateralis. The anterior horn 

 forms the anterior part of the cavity, and extends antero- 

 laterally and downwards in the frontal lobe. When seen in 

 frontal section it presents a triangular outline the floor 

 sloping upwards and laterally to meet the roof at an acute 

 angle (Fig. 197). It is bounded anteriorly by the posterior 

 surface of the genu of the corpus callosum, whilst the roof is 

 formed by the anterior part of the trunk of the corpus 

 callosum. The medial wall, which is vertical, is formed by 



