Thelumbar splanchnic nerves aresplanchnic nerves that arise from thelumbar ganglia (thelumbar part of thesympathetic trunk)^[1] and travel to an adjacentplexus near theaorta. They originate from L1 and L2.^{[citation needed]} Together with fibres from theaortic plexus, they form thesuperior hypogastric plexus.^[1]

These nerves containpreganglionic sympathetic andgeneral visceral afferent fibers.^{[citation needed]}

The site ofsynapse is found in theinferior mesenteric ganglion and the postsynaptic fibers innervate thesmooth muscle andglands of the pelvic viscera andhindgut.^{[citation needed]}

• figures/chapter_32/32-6.HTM: Basic Human Anatomy at Dartmouth Medical School

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