310 NEUROLOGY, OR ANATOMY OF NERVOUS SYSTEM 



Afferent and efferent nuclei of trigerninal nerve. 



Nucleus of spinal root of trigeminal nerve. 



Nuclei of Acoustic Nerve. Cochlear division: Dorsal 

 nucleus; ventral nucleus. Vestibular division : Medial nucleus; 

 lateral nucleus; superior nucleus. 



Superior olivary nucleus. 



Nucleus of trapezium. 



Reticular ganglionic formation. 



Nucleus incertus. 



Nucleus of lateral lemniscus. (Gray.) 



The Cerebellum 



The cerebellum is the largest portion of the hind-brain. 

 It lies in the posterior fossa of the skull, separated from the 

 occipital lobes of the cerebrum by the tentorium cerebelli. 

 It is behind the pons and medulla oblongata, connected with 

 the former through the middle peduncles, and partly embracing 

 the latter; and connected with the restiform body by means 

 of the inferior peduncles; the superior peduncles contain fibers 

 which pass from the cerebellum to the tegmentum of the mid- 

 brain, ventrad of the inferior corpora quadrigemina, the latter 

 bundle of fibers pass to the red nucleus of the opposite side, 

 some continue to enter the thalamus. 



The cerebellum is divided into a medial segment, the vermis, 

 or worm; two lateral hemispheres; a ventral and dorsal notch; 

 and a superior and inferior surface; and is subdivided into 

 lobes and fissures. 



The lobes and fissures seen on the superior surface of the 

 vermis or prevermis are from before backward, alternately; 

 lingula, precentral fissure; lobulus centralis, postcentral fissure; 

 culmen monticuli, preclival fissure; clivus monticuli, post- 

 clival fissure; folium cacuminis, peduncular fissure. Inferior 

 surf ace of vermis ; tuber vermis, postpyramidal fissure; pyramis, 

 prepyramidal fissure; uvula, postnodular fissure; nodulus. 

 The hemispheres present on their superior and inferior surfaces 

 the same fissures as mentioned under the vermis. The lobes 

 are, the superior surface from before backward;- the vincula 

 lingulye, ala lobuli centralis, anterior crescentic, posterior cres- 

 centic, superior semilunar; inferior surface, inferior semilunar 

 and gracile lobes are lateral prolongations of the tuber vermis; 



