THE BRAIN OF MODERN MAN 



809 



the primates until it reaches its euhnination at tliis jjoiiit. It seems fair to 

 say tliat no strueture in tlie human body shows more elearl\ the expansive 

 unfolding and progressive specialization indicative oi an cNohitionarx process 



MG. 345. MAN. LE\ EL IHKOLGH MIDDLE OF INFERIOR OLI\ AR^ IU)D^ . 



AMB, Nucleus Ambiguus; CB, Column of Burdach; ctt. Central Tegmental Tract; do, Dorsal Accessory 

 Olive; FLE, Dorsal Spinocerebellar Tract; cow. Ventral Spinocerebellar Tract; hel, Spino-olivary Tract of 

 Helweg; 10, Inferior Olive; mf. Mesial Fillet; nbl. Nucleus of Blumenau; nd. Nucleus of Dcitcrs; nfs. 

 Solitary Nucleus; Niiv, Hypoglossal Nucleus; nr. Nucleus of Rolando; nvd. Dorsal Vagal Nucleus; NI2, 

 Twelfth Cranial Nerve; po, Predorsal Bundle: PL, Posterior Longitudinal Fasciculus; pv. Pyramid; REF, 

 Reticular Formation; rst. Rubrospinal Tract; spr. Spinothalamic Tract; \o, \entral Accessory Olive. 

 [Accession Man. Section N 433. Actual Size 20 X 1 1 mm.) 



than thi' interior olivary nucleus. Starting as an ill-defined aggregation of 

 gray matter in the ventrolateral quadrant of the oblongata of lemur, this 



