43 2 



THE BRAIN 



Cornu Anterius Ventriculi Lateralis. The anterior horn 

 forms the anterior part of the cavity, and it extends forwards, 

 laterally and downwards in the frontal lobe. When seen in 

 frontal section it presents a triangular outline. The floor 

 is narrow and is formed by the white matter of the orbital 

 part of the frontal lobe. From it the medial and lateral 

 walls ascend to the roof, which is formed by the under surface 



Corpus callosum 



Longitudinal fissure 



Lateral ventricle / 

 Chorioid plexus 

 Interventricular foramen 



Claustrum 



i \ Internal capsule 



. r , i Lentiform nucleus 



Right column of fornxx ^ Caudate nucleus 



Septum pe"ucidum 



FIG. 167. Frontal section through the Cerebrum through the anterior part 

 of the lentiform nucleus. Seen from the anterior aspect. 



of the corpus callosum. The vertical medial wall is the 

 anterior part of the septum pellucidum, which separates the 

 anterior horns of the opposite sides from one another. The 

 in-bulging lateral wall is formed by the head of the caudate 

 nucleus (Fig. 167). 



Pars Centralis Ventriculi Lateralis. The central part 

 of the ventricle likewise is roofed by the corpus callosum. 

 On the medial side it is bounded by the posterior part of the 

 septum pellucidum, and more posteriorly by the attachment 



