850 



COMPARATIVE ANATOMY 



Nucleus letitiformis 



Capsula interna 

 (pars leaticulo- . 

 caudata) 



Capsula interna (pars lenticulo-thalamica) 

 Nucleus caudatua 



Nucleus amygdalae (cut) 



Commissura anterior 

 Stria termmalis 



Capsula interna (pars 



sublenticularis) 

 ^.Nucleus caudatus 



x ^Thalamus 



Tractus. J^ 

 olfactorius 



Tractus opticus '"_ 

 Inf undibulum ''" " 



Hypophy- (anterior lobe'"' 

 sis cerebri \ posterior lobe- 



Tubor cinereum/// 

 Corpus mamillare/ / 

 N. oculomotorius / 

 Basis pedunculi' 



Pons' , 



NCTVUS trigeminua (portio major)- x x 

 . Nervus trigcminus (portio minor)-'' ^_^-^ 



N. intermedius^'"'' 

 N. acusticus^'" 

 N. abducens 

 N. glossopharyngeus^ 

 Nervus vagus \ 



Oliva- 

 Fasciculus circumolivaria pyramidia 



Corpus geniculatum 



laterale 



Corpus pineale 

 Cor. geniculaturn mediale 

 Colliculus superior 

 Colliculus inferior 



s lateralis 

 Nervus trochlearis 

 ^--Brachium conjunctivum 



7- Brachium 



pontis 



Fossa flocculi 

 Crus flocculi 

 Nucleus denta- 

 tus cerebelli 



Corpus pouto-bulbare 



' Fasciculus spinocerebellaris 

 Nervus spinalis 



B. 



Fig. 475. 



A, Left lateral aspect of a human brain from which the cerebral hemisphere 

 (with the exception of the corpus striatum, the olfactory bulb and tract, and a 



small portion of the cortex adjacent to the latter) and the cerebellum (excepting 

 its nucleus dentatus) have been removed. The brain stem (segmental apparatus; 

 palseencephalon ) includes everything here shown with the exception of the strip 

 of cortex above the tractus olfactorius and the nucleus dentatus. Within its sub- 

 stance, however, are certain cortical dependencies (absent in the lowest verte- 

 brates), which have been developed to facilitate communication between the brain 

 stem and the cerebral cortex. The chief of these are found in the thalamus, basis 

 pedunculi, and pons. Compare this with the side view of an intact brain, Figure 

 473. (From Hsrrick after Cunningham.) 



B, Horizontal section of human cerebral hemispheres. 1, 2, A, H, L, F, etc., 

 Fiber systems. 



