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THE CERVICAL SYMPATHETIC TRUNK 330 
ley and indicate that the axons of these cells dispose themselves 
in one of the three following ways: 1) Usually they run trans- 
versely to the long axis of the ganglion to enter a gray ramus. 
In the initial part of their course these fibers do not give rise to 
branches. 2) The axons may run through a connecting nerve 
trunk into another ganglion. He is not able to say whether 
these axons only run through the second ganglion or whether 
they make connections with its cells. In the chick embryo he at 
one time described collaterals coming from those longitudinal 
fibers of the ganglia which take origin in neighboring ganglia. 
He is now inclined to doubt this observation and thinks it likely 
that these collaterals all come from fibers that have entered the 
sympathetic trunk through white rami at other levels. 3) In 
some cases they leave the ganglion and run toward the neighbor- 
ing arteries in the visceral nerves. 
Sala (’93) described two kinds of fibers in the sympathetic 
ganglia. Those of one variety are unbranched, varicose, and 
unite to form smaller or larger fascicles which run through the 
ganglion in every direction. These are the axons of the cells 
of the sympathetic ganglia. The fibers of the other kind area 
little larger, non-varicose,and give off collaterals which are finer 
and in their turn ramify abundantly. These are less numerous 
than the first and are found almost exclusively in the branches 
from the cerebrospinal system. It is not improbable, he says, 
that these are of cerebrospinal origin. 
In his elaborate description of nine types of cells in sympathetic 
ganglian Michailow has given very few details regarding the 
axons. However, it is to be noted that in none of these nine 
types does he describe the axon as terminating in a sympathetic 
ganglion and in only one does he describe it as giving off colla- 
terals (fig. 8, e). 
v. Lenhossék (’94), using Golgi preparations of the chick, traced 
axons of sympathetic ganglion cells into the neighboring ganglia, 
but did not say what became of them there. In one case he saw 
fibers entering a ganglion from a visceral nerve break up into 
branches. He considered these the axons of cells lying some- 
where in the visceral ganglia. From what we know now they 
might just as well be interpreted as the endings of long dendrites. 
