ANALYSIS OF THE SYMPATHETIC TRUNK 451 
The half-dozen fine fibers traced from the tenth ramus are more 
difficult to understand. It must be admitted that such fibers 
are just what one would find if sensory fibers arising in the 
sympathetic ganglia pass back along the white rami to end in 
the spinal ganglia (p. 333-334). They might also be accounted 
for as postganglionic fibers accompanying the white ‘ramus 
(p. 412-418). 
Fig. 7 Diagram of the thoracic sympathetic trunk with the corresponding 
spinal nerves and rami communicantes to illustrate the lesions produced in cat 
XIV. N.S.M. = N. splanchnicus major. 
Fig. 8 Diagram of the thoracic sympathetic trunk with the corresponding 
spinal nerves and rami communicantes to illustrate the lesions produced in cat 
XVI. N.S.M. = N. splanchnicus major. 
Osmic acid preparations of the greater splanchnic nerve showed 
a very restricted area of degeneration, almost the entire nerve 
being of normal appearance. 
Cat XVI. Killed twenty-two days after section of the roots 
of the ninth and tenth thoracic nerves proximal to the spinal 
ganglia (fig. 8). The trunk including the ninth, tenth, and 
