1g2 ELEMENTS OF MAMMALIAN ANATOMY. 
away with the forceps. The superior one, known also as 
the brachium conjunctivum, extends as a cord of fibers 
along the cranial half of the fourth ventricle and then 
beneath the corpus quadrigeminum. The inferior pedun- 
cle, or restiform body, forms part of the boundary of the 
caudal half of the fourth ventricle and enters the cere- 
bellum between the other two peduncles. It is composed 
of fibers from the spinal cord and medulla. 
PRACTICAL QUESTIONS AND SUGGESTIONS. 
Describe the meninges of the central nervous system. 
. Which of the five parts of the brain are exposed dorsally? 
. Draw the lateral aspect of the brain and label all features. 
. Draw the ventral aspect of the brain and label all features. 
5. Draw the dorsal aspect of the brain after the dorsal portion, in- 
cluding corpus callosum and fornix, has been removed. 
6. Describe the differences existing between the gyri and sulci of 
your specimen and the one described in the text. 
7. Write a description of the ventricles, giving dimensions and 
boundaries. - 
8. Describe the attachment of the pineal body. 
9. Which of the cranial nerves derive their name from their func- 
tion? 
10. Name the foramina giving passage to one or more of the 
cranial nerves. 
11. From which of the five parts of the brain do most of the cranial 
nerves originate? 
12. Describe the choroid plexus. 
13. What is the internal capsule? 
14. Draw a cross-section of the brain made by cutting through the 
optic commissure and label all parts. 
15. Draw a cross-section of the brain made by cutting through the 
middle commissure and label all parts. 
16. Draw a cross-section of the brain made by cutting through the 
corpora quadrigemina and label all parts. 
17. Write a description of the corpus callosum. 
18. Which is the smallest commissure of the brain? 
19. Explain the difference in structure between the white and gray 
matter. 
20. Describe the cerebellum. 
mp wD 
