Figure 54-2 A, Nerve supply of the urinary bladder and prostate showing the relationship of the various nerve structures to the large intestine and their distribution in the bladder and prostate. B, Schematic illustration showing the segmental nerve supply to the bladder, penis, and scrotum. Solid lines, preganglionic fibers; dashed lines, postganglionic fibers; dotted lines, sensory fibers. (From Gee WF, Ansell JS: Pelvic and perineal pain of urologic origin. In Bonica JJ [ed]: The Management of Pain, 2nd ed. Philadelphia, Lea & Febiger, 1990, pp 1368–1378.)