338 
MR. E. P. FRANCE ON DEGENERATIONS WHICH FOLLOW LESIONS 
cervical region. On the loft side there is some degeneration in a similar position to 
that on the right (see fig. 2d). 
Eighth Dorsal. —The degeneration here (right side) has much the same position as 
at the level of the fourth dorsal, although rather less in amount: that is to say, there 
are more normal fibres in the degenerated patch. The patch is nearer the circum¬ 
ference than higher up. There is a little degenera,tion to be seen on the left side, having 
a similar position to that on the right. 
Liimhar Region. —The degeneration in the crossed pyramidal tract on the right side 
comes cpfite to the circumference, and extends from the posterior root as a small patch 
outwards and forwai’ds. 
A few degenera,ted fibres can be seen in a similar position on the left side. 
Case 3. — No. 14 of First Series. 
Lesion .— Removal of the left gyrus marginalis for rather more than the posterior 
two-thirds, with a small amount of injury to the gyrus fornicatus (see ‘ Phil. Trans.,’ 
B, 1888, Plate 2, fig. 14). 
Result. —Paralysis of the leg and trunk muscles on the right side. The arm was 
slightly paralysed at first, but soon recovered, and for the first few days there was 
some loss of reaction to tactile impres,sions. 
This animal died three and a-half weeks after the operation. 
Degenercttions Observed. 
Internal Capside. —No degeneration can be made out with sufficient distinctness. 
Midhrain, Pons, and Medulla. —Scattered degeneration is to be seen in the 
pyramidal bundles of the left side. 
Spinal Cord. Cervical Region. —Scattered degeneration can be seen in the crossed 
pjramidal tract on the right side, bordering the direct cerebellar tract and gradually 
approaching the circumference. The greatest amount of degeneration is towards the 
poster!oi' cornu ; if becomes less as it passes forwards and outwards. 
The degeneration has a similar position to that seen in No. 2, although it is less 
distinct and smaller in amount. 
A few degenerated fibres can be made out with a higher power (Zeiss, E) in a 
similar position on the left side. 
Dorsal Region. —Degenerated fibres can be seen in a similar position to those in 
the cervical region, except that they are, on the whole, nearer the circumference. 
A few degenerated fibres can be seen on the left side as far as the lower dorsal 
region. 
O 
Lumbar Enlargement. —Degeneration is still to be seen here, on the right side, in 
the angle between the posterior root and the circumference. 
