832 



NEUROLOGY 





putamen. Its floor presents the following parts: the hippocampus, the fimbria 

 hippocampi, the collateral eminence, and the choroid plexus. When the 



Bulb of posterior cornu 



Posterior cornu 



Calcar avis 



Collateral eminence 



Calcarine fissure 



FIG. 738. Coronal section through posterior cornua of lateral ventricle 



choroid plexus is removed, a cleft-like opening is left along the medial wall of 

 the inferior cornu; this cleft constitutes the lower part of the choroidal fissure. 



Choroid plexus 



Bulb of posterior cornu 

 Calcar avis 



Lateral 

 cerebral 

 fissure 



Collateral eminence 

 Fimbria hippocampi 

 Hippocampus 

 FIG. 739. Posterior and inferior cornua of left lateral ventricle exposed from the side. 



The hippocampus (hippocampus major) (Figs. 739, 740) is a curved eminence, 

 about 5 cm. long, which extends throughout the entire length of the floor of the 



