34. M. L. Shorey 
Measurements of the ventral roots show this loss: 
WIDTH THICKNESS 
PER CENT PER CENT 
VAIN DADs 55 HhAo CabOno no oGUIboD DUdQHDasbeda Saud oud Odo acagaGuuenTE 31.9 45-4 
TiN WEIN(ES oA be odo abnoonbe ano undoaodeeooocnoaoaumoceewan goae sour 8.1 33-3 
GME Ouindsian sed ompS odo DadQdds Cpe dobacueubus onoEbAas50 Hedaboas™ 36.2 a9e4 
Measurements of the dorsal roots, which are more difficult to 
take accurately, because in some sections the boundary between 
them and the vertebrz is obscure, show a less, but still a constant 
loss: 
WIDTH THICKNESS 
PERCENT PERCENT 
TA TESTER VE rs aol i sle/a\csers/erarsiwcfoisiers eiehe Grsnslataie aie sue. are aia, o) fol ale, tr ay loko Sys O-aVay 36 ° 
iia KERSS oon bb obo sesso coohoo taco cob ph dacoonenasupasoDOsaUgoOs I 22 
Gio WIG. sod shuoodobohon dose oSbobocebad sb ebeoardbusos Saancadsune 38 II 
The ganglia of the operated side were also smaller, and this loss 
is expressed quantitatively in the following table: 
(In this it must be remembered that the 12th, 13th and 14th 
ganglia correspond to the 14th, 15th and 16th nerves.) 
LATERAL DORSO-VENTRAL 
DIAMETER DIAMETER THICKNESS 
PER CENT PER CENT PER CENT 
TZthiAn oO Mesenteric erent bie emer ce eiarestere t= 2A 16.7 20 
WVHA Osc pogo oubuoc ope. pose soneocgopoESeudbea doe DPF) Bg 33-3 
Tg thipant eon’ aicrisisltorsiccre ararsisiola sels she ate eee ctatolel als ecete sist olsy > 20.3 30.2 20 
The loss in the spinal cord will be best shown by a photograph of 
a typical section (Fig. 14). This was taken in the region of the 
15th nerve. The most evident difference here is in the ventral 
horn, this being decidedly smaller throughout the operated region. 
It is also noticeable that the abnormality is practically confined to 
the region of the 14th, 15th and 16th nerves, the first observable 
difference appearing three sections anterior to the beginning of 
ganglion 12, and although very careful measurements show slight 
differences to the eleventh section beyond the 14th ganglion it is 
markedly less immediately beyond that ganglion. ‘This loss 
in the ventral horn might conceivably be due to either of two 
reasons: the number of cells might be less, or the individual cells 
or part of them, might be smaller, or the loss might be due in 
part to both of these causes. Two methods of deciding this 
