424 S. W. RANSON AND P. R. BILLINGSLEY 
TABLE 1 
Connections of the spinal nerves with the vertebral ganglia, so far as these supply the skin, 
except that of the head and the anogenital region in the cat with an anterior arrange- 
ment of the spinal nerves—after Langley-Schafer’s Physiology, vol. 2, p. 634 
ae SYMPATHETIC GANGLIA bess 
TVS ol) AGS Gok se ie Rs Gees eee ie sets sea ee Ae | es TA ae el IV 
Wi Ge iS Gres tei ee co etc d ecans SOURS ct EMRE toc.) opi a hy. 28 pega Vv 
VI EIS Ge oe rg RG BT ie orca acon Sa eae lees) oe ah cae eA nd VI 
VII GUSte as ONG pees Ome cece eat ce Oe WS SPM octet nade: A ee Rn VII 
VIII GEESG 7 Abs Oats (Se SOMO Sere via ete ene tee ic Rs cee Rene ates Hea cnet ae eae VIII 
EX (GaSb) Asis | GreieiO. SOMO LL Soe, Saati orca PE icnars crete Ciscoe one IX 
D: Gl lace SER earache creo) ae! (0 eal en pela eae, Brew ie Ii Talia bint Gina toca c x 
SNOT 4 ee i ei ee Sree ey 8 ee TDS VS ces oO Mave ost Gri aa ete at ene ce XI 
UTD icin ceeectaycy ys ieee SEE Re ae eno mae Me alas Bi ZL MGM! OM (Alea aac gS ances oc Dae 
Gi Gli yl Pearce eae AERC oe tates . ONE Pan eee Oe ris ER Bye CE OOO ee Soc od ac [XII 
1 ee a re eA rt oS) 3 AN ER PR Om Se DN 4 (5) (CG) ie loko ee ee I 
TET RES 2. ER a SS ae Na Rn OR ee 8 ER a era By () (6). 7). 2S ee 
TAT Gs ee errs ek ee a AE ng oc) We ce Oa A (6), (6). 7; 1) 23; Coex sha 
downward. This is associated with the course of the fibers 
of which they are composed which pass not only into their 
segmental ganglia, but also upward into the cervical ganglia, 
downward into the lumbar and sacral ganglia and outwards into 
the collateral ganglia. Miller (09) has shown that the pregan- 
glionic fibers in man havea similar distribution. The connections 
of the spinal nerves with the ganglia of the sympathetic trunk so 
far as these supply vasomotor, pilomotor, and secretory fibers to 
the skin has been worked out in detail by physiological methods 
and is expressed in table 1. This shows that these preganglionic 
fibers from the nerves above the seventh thoracic are directed 
upward from the nerves below the tenth downward and from the 
seventh to the tenth, inclusive, both up and down. 
With the exception of the cervical and stellate ganglia, which 
contain other elements also, the ganglia of the sympathetic 
trunk may be regarded as aggregations of postganglionic pilo- 
motor, vasomotor, and secretory neurones whose axons are dis- 
tributed through the corresponding gray rami and spinal nerves. 
As we have stated before, the fibers of a gray ramus arise from 
the associated sympathetic ganglion, though a few fibers may 
