THE MEDULLA OBLONGATA 



363 



the spinal cord and medulla oblongata to the cerebellar 

 cortex. 

 {d) The dorsal funiculus of the spinal cord, as it passes forward 

 into the medulla oblongata, is divided into medial and 

 lateral portions. The medial portion, the fasciculus gracilis, 

 forms a narrow band terminating rostrally in a club-shaped 

 expansion, the clava. The lateral portion, the fasciculus 

 cuneatus, appears to pass into the restiform body but does 



Fifi. 123. Transverse section of the hindbrain passing through the posterior 

 edge of the attachment of the cerebellum. The white nerve fibres are stained 

 black by the method of Weigert. be, bundles of nerve fibres proceeding to the 

 brachium conjunctivum; cr, restiform body; fi, flocculus; 1, lingula (part of 

 vermis cerebelli, see Fig. 119) na, cochlear root of acoustic nerve; nf, root fibres 

 of facial nerve which emerge from the brain a little further forward; p, pyramid; 

 pf, paraflocculus; pm, cerebellar hemisphere (lobulus paramedianus) ; t, trape- 

 zoid body, composed of nerve fibres originating in the acoustic tubercle and 

 crossing to the opposite side of the brain, where they turn fonvard towards the 

 inferior colliculus and the medial geniculate body; ta, acoustic tubercle; v, fourth 

 ventricle; ve, vermis cerebelli. 



7. 



not actually do so. Both fasciculi end at this level. They 

 convey from the trunk and limbs impulses of muscle- and 

 joint-sensibility as well as tactile and related discrimination", 

 these being then transmitted to more anterior parts of the 

 brain by deeply situated fibres. 



The brain may be divided by a median vertical section, and 

 the medial surface of one-half (Fig. 124) may then be examined. 

 In addition to many of the features already observed from other 

 points of view, the following may be noted: 



