THE BRAIN 119 



The part between the anterior and posterior areas that is, 

 the part between the line of issue of the nerve-roots of the 

 spinal accessory, vagus, and glosso-pharyngeal nerves, and 

 line of issue of the nerve-roots of the hypoglossal is called 

 the lateral area, and corresponds to the lateral column of the 

 cord. 



Posterior area of the medulla. The postero-mesial column 

 (of Goll) of the cord is continued up into the medulla as the 

 funiculus gracilis, which expands as it approaches the 4th 

 ventricle. This expansion is called the clava ; and upon 

 reaching the 4th ventricle the clavae of opposite sides open 

 out to form the lateral boundary of the ventricle in its lower 

 part. 



The postero-lateral column (of Burclach) of the cord is 

 continued upwards into the medulla, where it expands slightly, 

 and is called the funiculus cuneatus, which, on the same level 

 with the clava, has an eminence, the cuneate tubercle. 



Between the funiculus cuneatus and the line of origin of the 

 nerve-roots of the spinal accessory, vagus, and glosso-pharyn- 

 geal, there appears in the lower part of the medulla a longi- 

 tudinal prominence, \he funiculus of Rolando, which broadens 

 out above into the tubercle of Rolando. It is formed by 

 the approach of the caput of the posterior cornu to the 

 surface. 



The Restiform body. : In the upper part of the medulla, a set 

 of fibres issue from the anterior median fissure, pass trans- 

 versely outwards over the anterior pyramid and olivary body, 

 and, continuing transversely, cross over the funiculus of 

 Rolando and the cuneate funiculus, to turn upwards on these. 

 They are the superficial arciform or arcuate fibres, and are mainly 

 derived from the gracile and cuneate nuclei of the same and 

 opposite sides; joined to these, just above the tubercle of 

 Rolando, are some transverse fibres which come from the 

 lateral column, known as the direct cerebellar tract. These 

 oblique fibres blend with the funiculus of Rolando, and with 

 the superficial fibres of the funiculus gracilis and funiculus 

 cuneatus, the whole forming the restiform body. Superiorly 

 the restiform body diverges from its fellow and enters the 

 cerebellum, of which it forms the inferior peduncle. 



Lateral area of the medulla. The lateral column of the 

 cord, as continued into the medulla, consists of three sets of 

 fibres. One set, the crossed pyramidal tract, crosses obliquely 

 through the anterior column and across the anterior median 

 fissure to the opposite side, where they form the greater part 

 of the pyramid. A second set coasts o{ the direct cerebellar 



