BASAL GANGLIA 



the caudate nucleus by the intervening bands of grey matter 

 (Fig. 2*15). 



The nucleus lentiformis comes to the surface at the 

 substantia perforata anterior, and a continuity between the 

 grey matter forming it and the grey cortex of the brain is 

 thus established. 



Caudate nucleus 



Fronto-occipital fasciculus r Thalamus 

 Superior longitudinal fasciculus 



External capsule 

 Claustrum 



Insula 



Putamen of lenti- 

 form nucleus 



Globus pallidus of J. 

 lentiform nucleus j 



Stria terminalis 



Upper temporal 

 sulcus 



Caudate nucleu 



Inferior cornu 

 lateral ventricle 



1 , Corpus callosum 

 .Chorioid plexus 



Septum pellucidum 



Fornix 

 ..Chorioid plexuses 



of third ventricle 



Third ventricle 

 Red nucleus 

 Subthalamic body 

 Optic tract 



Fimbria 



Pyramidal fibres 

 (cerebro-spinal) 



Chorioid plexus 



Hippocampal fissure 



Collateral fissure 



Cerebellum 

 Brachium pontis 

 Pyramid of medulla oblongata 



FIG. 217. Oblique frontal section of brain to show the course of the cerebro- 

 spinal fibres. The internal capsule lies between the lenticular nucleus 

 laterally and the caudate nucleus and thalamus medially. 



Claustrum. This is a thin plate of grey substance em- 

 bedded in the white matter which intervenes between the 

 lentiform nucleus and insula (Figs. 213 and 216). Followed 

 in an upward direction, it becomes gradually thinner until it 

 ultimately appears, when seen in section, as an exceedingly 

 delicate grey streak. As it is traced downwards, however, 



ii 33 a 



