RECONSTRUCTION 01- TROGl OD^ TES NKIER 613 



The dorsal acccssorN nucleus presents a somewhat sjniihir arrangement 

 consisting of a thin lamina olVraN matter ajjpliecl to the surface of the dorsal 

 branch ol the main nucleus. It extends upward for about the same distance 



FIG. l-^. DORS.AL SUKIACE OF GH.W MATTER OF BRAIN STE.M, 

 TROGLODYTES NIGER. 



Key TO Diagram, dorsal cochlear, Dorsal Cochlear Nucleus; inf. coll.. Inferior Colliculus; lat. genicu- 

 i.AT. BODY, L;iteral Geniculate Body; mlso-gkmcui.ate body. Mesial Geniculate Body; nucl. of durdach. 

 Nucleus of Burdacli; Nuc. of deitfrs and nucl. of deiters. Nucleus of Deilers; nlcl. of coll. Nucleus of 

 Goll; ret. ior\l. Reticular Formation; subst. cel. Rolando, Substantia Gclatinosa of Rolando; vent. 

 cocn.. Ventral Cochlear Nucleus. 



as the main nucleus and eephalicall\- comes to an end by becomin_t: conlTuent 

 with the dorsal Ijranch of the nucK'us. The dorsal surface i)f tlu' main nucleus 

 as well as the dorsal accessory nucleus arc embedded in tlu' ventral aspect 

 of the reticular formation and are therefore hidden from view m the reconstruc- 

 tion. The \'entromesial surface of the nucleus is in contact with the ])yramid, 

 the hllet and other tracts of the ventral Held of the oblongata. 



