Abdominal portion of the sympathetic trunk, with the celiac and hypogastric plexuses. (Hypogastric nerve visible but not labeled.)
|Anatomical terms of neuroanatomy|
The hypogastric nerve begins where the superior hypogastric plexus splits into a right and left plexus. Each of these divisions is considered a hypogastric nerve. The hypogastric nerve continues inferiorly on its corresponding side of the body, where it descends into the pelvis to form the inferior hypogastric plexus. Contents of the right and left hypogastric nerves include pre- and post-ganglionic sympathetic fibers from vertebral levels of T10-L2.
Sympathetic innervation by the hypogastric nerve is responsible for the emission of semen into the posterior urethra. Emission is the first phase of male ejaculation (followed by the second phase, expulsion). In contrast, erection is mediated primarily by the parasympathetic nervous system via pelvic splanchnic nerves.
- Alwaal, Amjad; Breyer, Benjamin N.; Lue, Tom F. (November 2015). "Normal male sexual function: emphasis on orgasm and ejaculation". Fertility and Sterility. 1053 (5): 1053. doi:10.1016/j.fertnstert.2015.08.033. PMC 4896089.
- Le, Bhushhan, Hoffman. First Aid for the USMLE Step1. p.613. 2019.
- Anatomy photo:40:09-0203 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: The Abdominal Aorta and Paraaortic Nerve Plexus"
- Autonomics of the Pelvis - Page 5 of 12 anatomy module at med.umich.edu