RECONSTRUCTION OF SIMIA SATYRUS 



537 



\c'ntr;ill\ and latcTall\ it passes toward tlu- Nfiitrolatfral angle of the 

 tegmentum. I lie dorsal surface of the reticular formation becomes broad 

 and is intimately connected with the \entral surface of the central gray 



FIG. 242. DORSAL SURFACE OF GRAY .MATTER Or BRAl.N STE.M, SI.Ml.A SATYRUS. 



Kev to Di.\<,r.\m. dors, coch., Dorsal C^ocliitar Nucleus; .\ieso-gen. body. Mesial Geniculate Body; nucl 

 oi' BURD.^cii, Nucleus of Burdaeli; N. of o., nuc. of drs. and nucl. of deiters. Nucleus of Deiters; nucl. of 

 r.oLL, Nucleus of Goll; ret. form., Reticular Formation; subst. gel. rolando. Substantia Gelatinosa of 

 Rolando; sup. coll., Superior Colliculus; vent, coch.. Ventral Cochlear Nucleus. 



matter \vhich is now IJatti-nmg out. Tiie reticular formation gradually 

 mcreases m bulk, lorming the chiel nuclear mass ot the tegmentum in the 

 upper oblongatal and pontile regions. It embraces in these le\els the dorsal 

 surface ol the mlerior oli\ary complex. Dorsal to the retiiular formation lie 

 the nucleus ol Burdach and the nuch'us ol Goll, together with the increasing 

 mass of the \estibular com|jle\. The reticular lormation comes into contact 

 with the \cntral surface of the central gray matter forming the lloor of the 

 lourth ventricle. 



