546 



THE NEEVOUS SYSTEM. 



glossopharyngeal nerves behind. It presents a very different appearance in its 

 upper and lower parts. In its lower portion it simply appears to be a continuation 

 upwards of the lateral area of th6 spinal medulla ; in its upper part a striking 

 oval prominence bulges out on the surface of the medulla, and receives the name 

 of oliva (O.T. olivary eminence). 



The lower part of this district, however, is very far from being an exact counter- 

 part of the lateral funiculus of the spinal medulla. The large lateral cerebro- 

 spinal tract is no longer present, seeing that it forms, in the medulla oblongata, 



Nucleus lentiformis 



Capsula interna (pars lenticulo-thalamica) 

 Nucleus caudatus 



Capsula interna 

 (pars lenticulo- v 

 caudata) s 



Union of 

 lentiform and 

 caudate nuclei 



Tractus 

 olfactorius 



Tractus opticus..''' 



rhfundibulum- 

 Hypophysis (anterior lobe - 



cerebri | p OS terior lobe ,. , 



Tuber cinereum / 



Corpus mamillare , 



Nervus oculomotorius 



Basis pedunculi 



Pons 

 Nervus trigeminus (portio major) 



Nervus trigeminus (portio minor) 



Nervus facialis 



Nervus intermedius 



Nervus acusticus 



Nervus abducens 



Nervus glossopharyngeus """ 



Nervus vagus \ 



Pyramis 

 ' Oliv 

 Fasciculus circumolivaris pyramidis 



Nucleus amygdalee (cut) 



Commissura anterior 

 Stria terminalis 



Capsula interna (pars sublenticularis) 



Nucleus caudatus 



Thalamus 



Corpus geniculatum laterale 



Corpus pineale 



Corpus geniculatum mediale 



Colliculus superior 



Brachium quadrigeminum 



inferius 



Colliculus inferior 



Lemniscus lateralis 

 Nervus trochlearis 



Brachium conjunctivum 



-.Brachium pontis 



Fossa flocculi 

 . Crus flocculi 



Nucleus dentatu 

 cerebelli 



- Corpus ponto-bulbare 



.... Fasciculus spinocerebellaris 



-- Nervus spinalis 



FIG. 481. LEFT LATERAL ASPECT OP A BBAIN FROM WHICH THE CEREBRAL HEMISPHERE (WITH THE i 



CEPTION OF THE CORPUS STRIATUM) AND THE CEREBELLUM (EXCEPTING ITS NUCLEUS DENTATUS) HA 

 BEEN REMOVED 



the greater part of the pyramid of the opposite side. Another strand of fibres, vi 

 the fasciculus spinocerebellaris (posterior), prolonged upwards in the lateral fur 

 culus of the medulla spinalis, gradually leaves this portion of the medulla oblongal 

 This tract lies on the surface, and is frequently visible to the naked eye as a whi 

 band (Fig. 481), which inclines obliquely backwards into the posterior district of t 

 medulla oblongata to join its upper part, or, in other words, to join the restifor 

 body. The remainder of the fibres of the lateral funiculus, comprising the fas< 

 culus lateralis proprius and the fasciculus anterolateralis superficialis, is continu 

 upwards in the lateral area of the medulla oblongata, and at the inferior border 

 the olive the majority of these fibres disappear from the surface by dipping irj 



