Lumbar splanchnic nerves : types of fibres, relation with collateral ganglion and plexuses

Lumbar splanchnic nerves

Lumbar splanchnic nerves  conveys two types of fibres

•       General visceral efferent fiber : Lumbar splanchnic nerve content sympathetic efferent fiber , It conveys pre-ganglionic sympathetic fiber .It innervates smooth muscle cells and glands

·         General visceral afferent fiber : Collect sensory information from the visceral 

Collateral ganglion related with lumbar splanchnic nerves

  Preganglionic sympathetic fibres of Lumbar splanchnic nerves  are synapse with postganglionic neuron present within the inferior mesenteric ganglion .

General visceral afferent fibres of lumbar splanchnic nerves are passes through the inferior mesenteric ganglion

Autonomic plexuses related with lumbar splanchnic nerves

  1^st lumbar splanchnic nerve give fibers to the :

•       coeliac , renal , inter-mesenteric  and inferior mesenteric plexuses

2^nd  lumbar splanchnic nerve give fibers to the

•       Inferior mesenteric plexus

3^rd   lumbar splanchnic nerve give fibers to the

•       Inferior mesenteric plexus

•       Superior hypogastric plexus

4^th   lumbar splanchnic nerve give fibers to the

•       inferior mesenteric plexuses

•       Superior hypogastric plexus 

 Lumbar sympathetic system innervates  :

Innervate pelvic viscera (ex: Bladder neck, Vas deferens,Prostate)  and vasculature.  

Clinical anatomy :

•       Damage to lumbar splanchnic nerves  during aortoiliac surgery can result in sexual dysfunction.