DUAL INNERVATION OF SPINAL GANGLION NEURONS ON PERINEUM AND BLADDER

Experiments were performed on 13 Wister rats. Fastblus (FB) was inject ed into subcutaneous tissue in perineum area and nuclear yellow (NY) w as injected into subserous lamina of the bladder wall, respectively. F B, NY and FB+ NY were mostly found in the spinal ganglions of L6, S1 a ns S2 segments. The numbers of FB, NY and FB+ NY labeled cells were 14 6, 186 and 81, in a total of 463 labeled cells and their proportion wa s 40%, 51% and 9%, respectively. The result indicates that the spinal ganglion neurons dually innervate both the somatic and visceral tissue s, and the convergence of somato-visceral sensory pathways might occur in the spinal ganglion cells.