Pelvic splanchnic nerves
|Nerve: Pelvic splanchnic nerves|
|Latin||nervi pelvici splanchnici
The pelvic splanchnic nerves arise from the ventral rami of the S2-S4 and enter the sacral plexus. They travel to their side's corresponding inferior hypogastric plexus, located bilaterally on the walls of the rectum.
They contain both preganglionic parasympathetic fibers as well as visceral afferent fibers.
The parasympathetic nervous system is referred to as the craniosacral outflow; the pelvic splanchnic nerves are the sacral component. They are in the same region as the sacral splanchnic nerves, which arise from the sympathetic trunk and provide sympathetic efferent fibers.
The proximal 2/3 of the transverse colon, and the rest of the proximal gastrointestinal tract is supplied its parasympathetic fibers by the vagus nerve. In the distal 1/3 of the transverse colon, and through the sigmoid and rectum, the pelvic splanchnic nerves take over.
In popular culture
- Pelvic+splanchnic+nerves at eMedicine Dictionary
- SUNY Labs 43:15-0107
- Autonomics of the Abdomen - Page 7 of 16 anatomy module at med.umich.edu
- Human anatomy at Dartmouth figures/chapter_32/32-6.HTM
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvicnerves)
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