352 



LABORATORY MANUAL OF HUMAN ANATOMY 



(c) Dorsal accessory olivary nucleus (nucleus olivaris accessorius 

 dorsalis). 



(12) Arcuate nuclei (nuclei arcuati). 



(13) Internal arcuate fibres (fibrae arcuatae internae). 



(14) Gray reticular substance (substantia reticularis grisea). 



(15) White reticular substance (substantia reticularis alba). 



FIG. 165. 



NYttPIIS) 



Transverse section through the pons and cerebellum at the level of the principal motor nucleus of the 



trigeminal nerve. New-born babe. (Weigert-Pal, series ii. section No. 212.) 



Br.conj., brachium conjunctivum ; C.t., corpus trapezoideum ; F.l.m., fasciculus longitudinalis 

 medialis ; F.Py., fasciculi pyramidales in the pars basilaris pontis ; L.m., lemniscus medialis ; X. V. (dec. ) , 

 decussating part of root of N. trigeminus ; N. V. (motor), root of N. trigeminus ; N. V.(scrts), sensory root 

 of N. trigeminus; N. V.I., root fibres of N. abducens ; Nu.m.m.n. V., nuclei motorii minores N. trigemini ; 

 Nu.m.p.n. V., nucleus motorius princeps N. trigemini; Nu.o.s., nucleus olivaris superior and superior 

 olivary complex ; R.d.n. V., radix descendens [mesencephalica] N. trigemini ; S.g., substantia gelatinosa. 

 (From Barker, The Nerv. Syst., New York, 1899, p. 483, Fig. 313.) 



(16) Medial longitudinal fasciculus (fasciculus longitudinalis medialis) 



(0. T. posterior longitudinal bundle). 



(17) Interolivary layer of lemniscus (stratum interolivare lemnisci). 



(18) Decussation of lemniscus or fillet (decussatio lemniscorum) (0. T. 



sensory decussation of medulla oblongata). 



