Innervation
5
Plate395
InnervationofUrinaryBladderandLowerUreter:Schema
Spinal sensory
(dorsal root)
ganglion
Dorsal (posterior) root
Ventral (anterior) root
White
Gray
Rami
communicantes
Celiac ganglia
Superior mesenteric ganglion
Aorticorenal ganglion
Renal artery and plexus
Intermesenteric
(aortic) plexus
Inferior mesenteric ganglion
Superior hypogastric plexus
Hypogastric nerves
Inferior hypogastric
(pelvic) plexus
Urinary bladder
Lumbar part
of spinal cord
L2 spinal
nerve (ventral
ramus)
1st and 2nd lumbar
splanchnic nerves
Ureter
Sacral
splanchnic
nerves from
sacral
sympathetic
trunk to
inferior
hypogastric
(pelvic)
plexus
Sympathetic trunk
Sacral part
of spinal cord
Ascending
fibers
Descending
fibers
Gray rami
communicantes
Sacral plexus
Pelvic splanchnic nerves
Sphincter urethrae
muscle (external)
superior to perineal
membrane
Bulbospongiosus muscle
Prostatic plexus
Vesical plexus
Pudendal nerve
Afferent fibers
Parasympathetic
fibers
Preganglionic
Postganglionic
Preganglionic
Postganglionic
Sympathetic
fibers
S2
Somatic efferent fibers
S3
S4
L1
L2
