THE CEREBRUM 



449 



the grey matter of the substantia perforata posterior, and also, 

 more posteriorly, by the tegmenta of the cerebral peduncles. 

 Anteriorly, it is bounded by the lamina terminalis, the anterior 

 commissure, and the columns of the fornix. At the angle of 

 junction of the anterior boundary and the floor lies the optic 



rrow passing through interventricular foramen 

 Caudate nucleus in right lateral ventricl 

 Remains of septum pellucidum 

 Callosal sulcus f 

 Sulcus cinguli 



Gyrus cingul 



Genu of corpus 

 callosum 



Sub-callosal 

 gyrus 



Paraterminal 

 body 



Right column 

 of fornix 



nterior commissure 

 Lamina terminalis 



Optic recess 

 Optic chiasma 

 Infundibulum 

 Hypophysis 



Tuber cinereum 

 Mamillary body / 

 Oculo-motor nerve 



Splenium of corpus 

 callosum 



Habenular commissure 



Pineal body 

 Posterior commissure 



Lamina quadrigemina 

 (Tectum) 

 Aquaeductus cerebri 



Pedunculus cerebri 

 Anterior medullary 

 velum 

 Lingula 



Fourth ventricle 

 Nodule 



Median aperture of 

 fourth ventricle 



Medulla oblongat 



Medulla spinalis 



FIG. 177. Sagittal section of Corpus Callosum, Fornix, Diencephalon, Mid- 

 brain, and Hind-brain. The septum pellucidum has been removed to 

 expose the cavity of the right lateral ventricle, from which an arrow 

 passes through the interventricular foramen to the third ventricle. 



chiasma. Each side wall is formed by the medial surfaces 

 of the corresponding thalamic and hypothalamic parts of the 

 diencephalon. A little anterior to the middle of the ventricle 

 the cavity is crossed by the massa intermedia, which connects 

 the thalami with each other, and anterior to that the column 



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