AND PHYSIOLOGY. 



321 



571. Cerebral Ganglia. — Also lying directly upon the 

 base of the brain, are found several distinct enlargements or 



Fig. 307. 



A View of the Base of the Cerebrum and Cerebellum, together with their Nerves. 

 1, Anterior Extremity of the Fissure of the Hemispheres of the Brain. 2, Posterior Ex- 

 tremity of the same Fissure. 3, The Anterior Lobes of the Cerebrum. 4, Its Middle 

 Lobe. 5, The Fissure of Sylvius. 6, The Posterior Lobe of the Cerebrum. T, The 

 Point of the Infundibulum. 8, Its Body. 9, The Corpora Albicantia. 10, Cineritius 

 Matter. 11, The Crura Cerebri. 12, The Pons Varolii. 13, The Top of the Medulla 

 Oblongata. 14, Posterior Prolongation of the Pons Varolii. 15, Middle of the Cerebel- 

 lum. 1(5, Anterior Part of the Cerebellum. 17, Its Posterior Part and the Fissure of its 

 Hemispheres. 18, Superior Part of the Medulla Spinalis. 19, Middle Fissure of tl.a 

 Medulla Oblongata. 20, The Corpus Pyramidale. 21, The Corpus Restiforme. 22, TLa 

 Corpus Olivare. 23, The Olfaetory Nerve. 24, Its Bulb. 25, Its External Root. 26, 

 Its Middle Root. 27, Its Internal Root. 28, The Optic Nerve beyond the Chiasm. 

 29, The Optic Nerve before the Chiasm. 30, The Motor Oculi, or Third Pair of Nerves. 

 31, The Fourth Pair, or Pathetic Nerves. 32, The Fifth Pair, or Trigeminus Nerves. 

 33, The Sixth Pair, or Motor Externus. 34. The Facial Nerve. 35, The Auditory— the 

 two making the Seventh Pair. 36, 37, 33, The Eighth Pair of Nerves. (The Ninth Pair 

 are not here seen.) 



571. What are the cerebral ganglia ? 



