466 



THE BRAIN 



hypothalamic body, which is limited to the posterior part of 

 the subthalamic region, (tf) The lentiform nucleus now lies 

 above the roof of the inferior horn of the lateral ventricle, 

 from which it is separated by a layer of transversely directed 

 white fibres (Fig. 188). (e) The lentiform nucleus is not 



"Caudate nucleus 



Occipito-frontal fasciculus t Tbalamus 

 Superior longitudinal fasciculus 



External cap; 



Claustrum 



lusula 



Putamen of lenti- 

 form nucleus 



Globus pallidus of lr. 

 lentiform nucleus I 



Stria terminalis f? 

 Upper tempor 

 " ./. sulci 

 Caudate nucl< 



Inferior cornu of 

 lateral ventricle 



Corpus callosum 



Chorioid plexus 



Septum pellucklum 



Fornix 



Chorioid plexuses 



of third ventricle 



Third ventricle 

 Red nucleus 

 Subthalamic body 

 Optic tract 



Fimbria 



Pyramidal fibres 

 (cerebro-spinal) 



Chorioid plexus 



1 Hippocampal fissure 



Collateral fissure 



Cerebellum 



Brachium pontis 

 Pyramid of medulla oblongata 



FIG. 1 88. Oblique frontal section of Brain to show the course of the cerebro- 

 spinal fibres. The internal capsule lies between the lentiform nucleus 

 laterally and the caudate nucleus and thalamus medially. 



now so distinctly divided into three segments by the medullary 

 laminae. 



When the examination of the surface appearances of the 

 sections is completed the .dissector should study, in more 

 detail, the parts- which he has seen in various portions of their 

 extent in the series of sections. He should replace the 



1 This fissure is-an artifact (Elliot Smith). 



