<prompt> All of the following nerves are involved in the process of erection of penis, EXCEPT:Pudendal nerveSacral plexusHypogastric plexusNervi erigentes S2,3,4  <response>: Erection is parasympathetic and emission and ejaculation are parasympathetic. The erectile response is mediated by a combination of central psychogenic innervation and peripheral reflexogenic innervation. Sensory nerves that originate from receptors in the penile skin and glans converge to form the dorsal nerve of the penis, which travels to the S2-S4 dorsal root ganglia the pudendal nerve. Parasympathetic nerve fibers to the penis arise from neurons in the intermediolateral columns of the S2-S4 sacral spinal segments. These efferent parasympathetic fibers are in the pelvic splanchnic nerves nervi erigentes. Sympathetic innervation originates from the T-11 to the L-2 spinal segments and descends through the hypogastric plexus. Ref: Moon D.A., Foreman K.B., Albeine K.H. 2011. Chapter 13. Male Reproductive System. In D.A. Moon, K.B. Foreman, K.H. Albeine Eds, The Big Picture: Gross Anatomy. 