MEDULLA OBLONGATA 



being an exact counterpart of the lateral funiculus of the spinal 

 medulla. It has been noted already that the large fasciculus 

 cerebrospinalis lateralis, which in the spinal medulla lies 

 in the lateral funiculus, is not present in that district of the 

 medulla oblongata; above the decussation of the pyramids 

 it forms the chief part of the pyramid of the opposite side. 

 Another small strand of fibres, the fasciculus cerebdlospinalis 

 (O.T. direct cerebellar tract), prolonged upwards in the lateral 



Pineal body 



Frenulum veli 



Anterior 

 medullary velum 



Brachium 

 conjunctivum 



Brachium pontis 



Striae medullares 



Area acustica 



Ala cinerea 



B'uniculus cuneatus 

 Funiculus gracilis 



Superior 

 quadrigeminal body 



Inferior 

 quadrigeminal body 



Cerebral peduncle 



Pontine part of floor 

 of ventricle iv. 



Colliculus facialis 

 Area acustica 



Restiform body 

 Trigonum hypoglossi 

 Clava 



Rolandic tubercle 

 -Funiculus cuneatus 



FIG. 222. Posterior view of the Medulla Oblongata, Pons, and Mesen- 

 cephalon of a full-time Foetus. The greater part of the roof of the 

 fourth ventricle is removed. 



funiculus of the spinal medulla, gradually leaves this portion 

 of the medulla oblongata. This tract of fibres lies on the 

 surface, and it is often visible to the naked eye as a white 

 streak inclining obliquely into the posterior district of the 

 medulla oblongata to join its upper part, i.e., the restiform 

 body. The great majority of the remainder of the fibres 

 which are prolonged upwards from the lateral funiculus of 

 the spinal medulla disappear from the surface at the lower 

 border of the olive, by dipping into the substance of the 

 medulla oblongata under cover of that projection. A narrow 

 band, however, is carried upwards to the pons, in the interval 



