6-2 THE HIGHER -\NTHROPOIDS 



fii' cfetribution. For this reasc - .ntn.- 

 tc reas the ities repre- 

 sented by the prosressh-e!y ex]: _ e cerei ave 

 eshibr ^e of functional adaptation. 



LEX-EL OF EMERGENCE OF SIXTH CR_\XIAI. NERVE, NER\T 5 A? - 505) 



.-.- rvel the first pontile elements make their a; 



in size of the fourth ventricle. The elements of the Dons constitute 

 large masses of nuclear substar - 3ying a 



pontife nuclei > PN i. Other elements ol the ix>ns \ - is level ' 



the (fccussating fibers of the oallio-oonto-cerebellar svste: 

 grav matter here fomv? a th: r 



ve 'ntains us (Nab grves rise 



to the sixth - aer^-e, the nervui .rns < N6^. 7 - 



n€Tve p>roceed forward and toward the basis of the axis. Tihe/ 

 the collected bu : j\TamidaJ s>stem ' Py*. The r 



e jxjntile nucleus i PN^ reoresents th 

 ladofthe nucleiisarciformis. In : ^ 



abducentis, is a collection of fibers : _- the sc. 



gent course of the seventh nerve (N- i. The first p>ort!' _-ent 



fiber? of the seventh nerve, arranged in their t-» 



api 5 the floor of the ventricle. The fo _'ent 



course of the se\'enth nerve extends obliquely : t'^'^'. ard its pwint 



of emei^ence in common with the eighth nerve :: -tile sulcus. 



The fibers of this part of the emerorent course of the seventh ner\-e pass 

 between the nucleus fac _ igemini i NR) 



whose outer _ vrth the now densely comp>acted 



bundle of hea\Tly myeli: xons, ti". _ .ract of the trigeminal 



nerve (Trdj. 



