HORIZONTAL SECTIONS OF THE BRAIN 



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Preolfactory lobe 



The Peripheral Part 



1. Bulbus olfactorius. 



2. Tractus olfactorius. 



3. Tuberculum olfactorium and trigonum. 



4. Area parolfactoria (Broca). 



5. Stria (gyrus) olfactorius medialis. 



6. Stria (gyrus) olfactorius intermedialis. 



7. Stria (gyrus) olfactorius lateralis. 



8. Anterior perforated substance. 



Postolfactory lobe*) 9. Gyrus subcallosus and Broca's diagonal 



band. 



Cortical- 



Central 



The Cortical and Central Part 



1. The hippocampus. 1 



2. The uncus. 



3. Gyrus dentatus. 



4. Fasciola cinerea. 



5. Indusium, medial and lateral longitudinal striae 



upon the corpus callosum. 



6. Gyri Andrese Retzii. 



7. Gyri subcallosi. 



8. Fornix and fimbria. 



9. Corpus albicans and albicanothalmic tract. 



10. Part of anterior commissure (precommissure). 



11. Part of septum pellucidum. (Gray.) 



Horizontal Sections of the Brain 



Horizontal section of the hemispheres about one-half inch 

 above the corpus callosum brings into view the white matter 

 constituting the centrum ovale minus. This is dotted with 

 the puncta vasculosa, due to the divided bloodvessels. A 

 section at the level of the corpus callosum is called the centrum 

 ovale magus of Vieussens. 



1 Not to be confounded with the hippocampal gyre of the pallium. 



