8i6 



MAN 



orang-outang, the cliinii)anzee and the gorilla call upon the muscular system 

 for ihc cIc\cIopiiiciit of great strength. If, as l.uciani hi-lieved, the cerebelluni 

 served in the canaeitv of aucmentnig the power ol muscular contraction, 



FIG. 348. MAX. LEVEL OF THE CEREBELLAR NUCLEL 



CBi., OicIkIIihh; sdi, Dintatc Nuck-us; nfg. Nucleus Fastigii; nod. Uvula; obl, Oblongata; I'v, Pyramid; 



VEN IV, Fourth Ventricle. |Accession Man. Section N 201. Actual Size 70 X 38 mm.] 



then the three great anthro[)oids should far e\ce(.'d the human in cerebt'llar 

 development. Its function more piobahlx is ri'laled to the delicate and exact 

 adjustment of tlu' postural att libutt's which permcati' all motor acti\ity. 

 Motion has been describt-d as a Ihiid sticam ol postures. The ])ostural ele- 

 ment may be discerned in all xolitional acts. W hen investigated in relation 

 to movements of the hand and Imgers, tlu- number ol postures entering into 

 the simplest acts is found to be suiprisingly large. Each of these postures 

 during the entire movenn'nt is (k'|X'ndent h)r its precision upon impulse's 

 arising in the cerebellum. This t>pt' of cerebellar control applies chielly to 

 complex motor actixitics. Disease or injiirx m tlu' lateral lobes ol theccrebel- 



