Corpus: Lumbar Splanchnic nerves

The Nervi splanchnici lumbales belong to the visceral nerves (Nervi splanchnici). They arise from the lumbar part of the sympathetic trunk or the lumbar ganglia and originate from the L1 and L2 segments of the spinal cord.

The lumbar splanchnic nerves run to neighbouring nerve cell plexuses on the aorta, the inferior and superior hypogastric plexus and the inferior and intermesenteric mesenteric plexus. They contain efferent, preganglionic sympathetic and visceroafferent fibres. They innervate the smooth muscles and the glands of the pelvic viscera and rectum.