232 THOMPSON YATES LABORATORIES REPORT 
A marked feature in our sections is the presence of a considerable number of degenerated fibres 
occupying tiie periphery of the most anterior part of the white matter, and dipping down along 
tlie anterior fissure. 
Degenerated fibres in a similar position iiave been noted by Sherrington* in the 
Monkey after complete transection of the cord. 
This condition in the human cord does not appear to have been noted by other writers. 
Tracing these fibres upwards it is seen that the formation of tlie pyramids pushes them backwards. 
At this level (Fig. 4) the greater part of the fibres pass inwards, and become dispersed in the white 
matter between the posterior border of the pyramid and the lateral nucleus of the medulla. Our 
sections do not give positive evidence whether these fibres terminate in the lateral nucleus or not, 
but such a condition appears probable. 
Fig. 7 
Pons at the exit of the Vth nerve. 
In Fig. 6 the main part of the ventral cerebellar tract is seen just external to the inferior 
olive. In Fig. 7 it is placed more deeply, just ventral to the outgoing Vth nerve. In Fig. 8 it 
is seen curving round the superior peduncle of the cerebellum, and entering the superior 
medullary velum in an identical position to that described by Bruce. A few degenerated fibres 
were found at a slightly higher level, but the material at our disposal, unfortunately, did not allow 
of our determining whetlier tliese passed to the inferior corpora quadrigemina. 
Fig. S 
Pons at its upper limit. 
(IV) Spinal portion of the IVth posterior cervical root. — In one of the preceding cases this 
root was considerably damaged, and by means of the Marchi method its course could be 
accurately traced. 
