RECONSTRUCTION OF PITHECUS RHESUS 



393 



the mid-level of the nucleus of the eohmin of Burdaeh, there appears a 

 secondary portion of the nucleus situated laterally in the collection of the 

 ascendino; fibers of the column of Burdaeh, hrst as isolated groups of gray 



FIG. 184. VENTRAL SURFACE OF GRAY MATTER OF BRAIN STEM, 

 PITHECUS RHESUS. 



Key to Diagram, inf. olive., Inferior Olive; lat. gen. body. Lateral Geniculate Body; meso-gen. body. 

 Mesial Geniculate Body; nuc. of burdach. Nucleus of Burdaeh; pontile. Pontile Nuclei; ret. form.. 

 Reticular Formation; subst. gel. rolando. Substantia Gelatinosa of Rolando; subst. nigra. Substantia 

 Nigra; vent, cochlear, Ventral Cochlear Nucleus; vent, gray col.. Ventral Gray Column. 



matter which coalesce to form a large nuclear mass lying lateral to the stem 

 of the nucleus of the column of Burdach; this is the nucleus of Blumenau. 

 It rapidly establishes connection with the mesial portion of the nucleus, 

 its nuclear masses presenting the typical leafy arrangement characteristic 

 of it. It extends laterally for a considerable distance and overhangs the 

 prolongation of the substantia gelatinosa trigemini. Gradually encroached 

 upon by the vestibular complex, it disappears from view, being entirely 

 replaced by the vestibular nuclei. 



