REMOVAL OF THE BRAIN 



209 



of the dura mater, termed the diaphragma sellce. In its centre is an 

 aperture through which the infundibulum passes to join the hypophysis 

 (O.T. pituitary body) ; and it binds down the hypophysis in the fossa. In its 

 anterior and posterior margins, respectively, are lodged the sinus inter- 

 cavernosus anterior and the sinus intercavernosus posterior (O.T. circular 

 sinus). 



Superior sagittal sinus 



Falx cerebri 



Internal carotid arte 



Infundibulum 



Cavernous sinus 

 Oculo-motor nei 



5asilar arteiy 



Optic nerve 



Ophthalmic artery, 



Maxillary nerve 



smilunar ganglion 



liddle meningeal 

 artery 



isterior cerebral 

 artery 



eat superficial 

 petrosal nerve" 



Pedunculus 

 cerebri 



Substantia 

 nigra 



Lamina 

 quadrigemina 



Cerebellum 



Straight sinu 



Trochlear nerve 

 "Basal vein 



Transverse sinus 

 Great cerebral vein 



FIG. 88. Interior of the Cranium after the removal of the cerebrum. The 

 transverse, straight, and superior petrosal sinuses have been opened, and 

 the dura mater has been removed from the floor of the middle fossa. 



In the dura mater, on each side of the hypophyseal 

 (pituitary) fossa, lies the corresponding cavernous sinus, which 

 will be dissected later, and still more laterally are the de- 

 pressed lateral portions of the middle cranial fossa, lined with 

 dura mater, in which the trunk and some of the branches of 



VOL. II 14 



