PLATE 2 
EXPLANATION OF FIGURES 
12 Nerve just distal to spinal ganglion; a, dorsal root just outside the 
ganglion; b, ventral root; c, ventral ramus of nerve; d, dorsal ramus of nerve; e, 
an arrow points to a central bundle of ventral root fibers running into the dorsal 
ramus. 
13 Higher magnification of the central portion of fig. 12. The central 
bundle is derived from the ventral root and contains only medullated fibers; the 
fibers passing in the other direction are from the dorsal root. A large part of these 
are non-medullated. 
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