THE BRAIN OF MODERN MAN 



797 



bral prchiiK'Ics, suggest the great acKanees which tlie hiiinan brain lias 

 made in the organization of nidkinetie eontroL VUv large p\ raniici serves for 

 the coiueyanei' of motor impulses troni the eorlex which controls somatic 



FIG. 341. DOKSAL SLHI-ACE OF BRAIN STEM, HOMO SAPIENS. 



lActual Lengtii 82 iniii.] 

 Key to Diagram, dors. m. fis., Dorsoiiicdian Fissure; ooks. m. sept., Dorsomcdian Septum; fovea inf.. 

 Fovea Inferior; inf. coll., Inferior Colliculiis; middle cerebel. pedunc. Middle ("erebellar Peduncle; sup. 

 CER. PEIJ., Superior Cerebellar Peclunele; sup. coll., Superior ("ollieiihis; ri li. rule;., luhertulum Trif;einini. 



activity. The pons has a somewliat sunilar signiheanee since it represents 

 those libers which connect the cerebral iiemispheres w ith the lateral lobes of 

 the cerebellum. 1 he cerebral peduncles express both tlu' connection between 

 the cerebral hcmisplu'res and the spinal cord in the interest ol voluntary 

 control, and tlu' pallio-|jonto-cerebellar association m relation to coor- 

 dination. 



The dorsal surface ol tlu- oblongata gi\es lurthe'r em|jhasis to the 

 advances in the human brain. The ela\al eminence (column and nucleus of 

 Goll) is separated by the dorsal i^aramedian sulcus Irom the cuneus (cohimn 



