312 



ANATOMY OF 



section of the cerebellum- 7*. Ganglion of the cerebellum. 8. Converging 

 fibres of the cerebellum. 9. Commissure of the cerebellum or mesocephalon. 

 10, 10. Par trigeminum. 11, 11. Crura of the cerebrum. 12. Transverse inter- 

 lacement below the optic nerve. 13. One of the corpora albicantia. 14. Pro- 

 longation of the corpus albicans towards an anterior pillar of the fornix. 

 15. Optic nerve. 16. Optic nerve just before their decussation, turned back. 

 17. Band of transverse fibres of the optic nerve. 17. Reinforcement of optic 

 nerve at the decussation. 19. Olfactory nerve. 20. Its internal root. 21. Its 

 external ditto. 22. Its middle ditto. 23. Anterior commissure. 24. Internal 

 part of the great superior ganglion or corpus striatum. 25. External part of 

 ditto. 26. The bundles of the corpus striatutn. 27. Anterior plate of the 

 corpus callosum. 28. Convolution at the bottom of the fissura Sylvii. (Gall.) 



ations like the tree called the tree of life, whence their name of 

 arbor vita; and one central. 



A lateral view of the encephalon, sufficient having been removed to show the 

 interior of the chorda oblongata. 1. Origin of the anterior pyramid, or great 

 original band of the cerebrum. 2. The fibres of the anterior pyramid entered 

 into the mosocephalon or great commissure of the cerebellum, and enlarged in 

 their passage through it. 3. Crura, or great fibrous bands, of the cerebrum. 

 4. Their locus niger. 5. The corpus olivare or oval ganglion of the great chorda 

 oblongata. 6. The thalamus opticus or great inferior ganglion of the cere- 

 brum. 7, 7, 7. The corpus striatum or great superior gangb'on of the cerebrum. 

 8. Corpus restiforme or original band of the cerebellum. 9. Corpus den- 

 tatum or ganglion of the cerebellum. (Gall.) 



A smaller division of the brain, but the firmest, is the Meso- 

 cephalon, so named from its situation in the centre of the base, 

 between the cerebrum and cerebellum, and over the spinal chord. 

 (Cut, p. 311.) Two processes of the cerebrum, called crura cerebri, 

 which contain some grey substance, whence the name locus niger, 



