360 



ANATOMY IN A NUTSHELL. 



the inferior olivary nucleus and the dentates nucleus. The olivary nucleus is 

 hollow and gives off, from an opening in its side, little fibres called the ped- 

 uncles of the olivary body. Next to the olivary and lateral tract external we 

 have part of the restiform body. Another name for the restiform body is in- 

 ferior pedicles of the cerebellum. The posterior surface of the medulla has the 

 postero-median fissure and on each side' of it is (1) the funiculus gracilis, 

 (2) funiculus cuneatus, (3) the funiculus Rolando. (4) lateral tract. The 

 upper portion of the posterior surface makes the restiform body or the inferior 

 peduncles of the cerebellum. 





PLATE CLXXX. 



POST. COMMISSURE. 



EPIPHYSIS OR 

 PINEAL GLAND. 



SPLENIUM OF CORPUS CALLQSUM 



ANT v COMMISSURE. 



U "^FORAMEN OF MONRO. 

 OPTIC NERVE. 



INFUNDIBULUM. 



HYPOPHYSIS OR 

 PITUITARY BODY. 



A Sagittal Section of Brain, Showing the Third and Fourth Ventricles 



The fibres in the cold which travel through the direct cerebellar tract, 

 which is in the lateral column of the cord, pass up into the medulla into the resti- 

 form body, instead of passing straight into the lateral column. The funiculus 

 Rolando is a continuation of the gray matter from the posterior horn of the 

 cord, where it is called substantia gelatinosa Rolando, up into the medulla 

 where it is situated between the funiculus cuneatus and lateral column. 



Cerebellum (little brain) is about one-tenth of the entire brain. It weighs 

 about five ounces. It is about one-eighth as large as the cerebrum in the adult. 



In early child] 1 it may he as small as one-twentieth of the cerebrum. It is 



situated in the posterior fossa at the base of the skull, being separated from the 

 cerebrum by the tentorium cerebelli. It consists of two hemispheres connected 

 by the worm (vermiform process). The medulla is situated in the anterior 



