Pelvic pain is mediated by

The anatomical structures that may give rise to pain in the pelvic region belong to the urinary, reproductive, and gastrointestinal systems and to their associated blood and lymphatic vessels. These structures, innervated by the somatic (T12-S5) and visceral (T10-S5) nervous system, create a complex anatomical and neurobiological network . The hypogastric plexus is the main autonomic neuronal center of the pelvis, while the somatic innervation is guaranteed by fibers travels in the pudendal nerve. This is the main nerve of the pelvis, involved in a great amount of pelvic pain conditions. It contains also sympathetic and parasympathetic efferents and visceral afferents. The pudendal nerve originates from the sacral plexus (S2-S4), then exits the pelvis through the greater sciatic foramen into the perineal area, through the pudendal (Alcock's) canal, and finally spreads into three main terminal branches: the inferior rectal nerve, the superficial perineal nerve, and the dorsal nerve of the clitoris, which innervates the pelvic structures and the external genitalia. In addition to sensory branches, the pudendal nerve provides motor innervation to anal and urethral sphincters, as well as to the bulbospongiosus and ischiocavernosus muscles (involved in the bulbocavernosus response and orgasm). Ref - pubmed.com