Dorsal Root Potentials and Ventral Root Reflexes Evoked by Nonmyelinated Fibers

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Science  06 Dec 1968:
Vol. 162, Issue 3858, pp. 1140-1142
DOI: 10.1126/science.162.3858.1140


Electrical stimulation of C-fibers in the cat superficial peroneal nerve, with the A-fibers either conducting or blocked by cold, evoked dorsal root potentials having the same polarity as those evoked by A-fibers. Ventral root reflexes evoked by A-fibers were facilitated by a pure C-volley in the same or another nerve, but dorsal root potentials evoked by A-fibers were reduced by isolated dorsal root potentials from C-fibers. In the absence of anesthetics, single C-volleys produced brisk and prolonged reflex discharges in ventral roots.

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