TARSIUS SPECTRUM iii 



pretation of olivary fLinction, tarsius is an important witness concerning the 

 activity of this nucleus. If, as is assumed to be the fact, the olivary nucleus is 

 essential to simultaneous coordination of the hands, eyes and head in complex 



FIG. 54. TARSIUS SPECTRUM. LEVEL THROUGH MIDDLE OF INFERIOR OLIVE. 

 CB, Column of Burdach; cen, Central Gray Matter; fle, Dorsal Spinocerebellar Tract; cow, Ventral Spino- 

 cerebellar Tract; 10, Inferior Olive; mf. Mesial Fillet; nb, Nucleus of Burdach; NFS, Nucleus Fasciculus 

 Solitarius; ng, Nucleus of Goll; nhy, Hypoglossal Nucleus; nr, Nucleus of Rolando; nvd, Dorsal Vagal 

 Nucleus; N12, Hypoglossal Nerve; pd, Predorsal Bundle; pl, Posterior Longitudinal Fasciculus; py, Pyramid; 

 REF, Reticular Formation; rst, Rubrospinal Tract; spt, Spinothalamic Tract; trd, Descending Trigeminal 

 Tract. [Accession No. 210. Section log. Actual Size, 7X4 mm.] 



skilled acts and helps to facilitate the coordination of all skilled learned 

 performances, its inferior development in the tarsier imphes a low develop- 

 ment of such activity. 



