Download PERITONEUM and TORSION of GUT TUBE

NEUROLOGY
of
ABDOMINAL REGION
Vagus Nerve

Provides parasympathetic innervation to
abdominal viscera:
To left colic flexure.
Branches:
Esophageal branches (to esophageal plexus).
Gastric branches:
Anterior gastric to stomach.
Posterior gastric to stomach.
Gall bladder.
Intestinal.
Lumbar Plexus
Ventral rami of L1-3 and most of L4.
 Muscular branches:

Nerve to quadratus lumborum (T12-L3).
Nerve to psoas major (L1-L3)
Nerve to psoas minor (L1)
Lumbar Plexus

Iliohypogastrric nerve:
L1.
Travels lateral to psoas major.
Innervates:
Lateral buttock.
Hypogastric region.
Lumbar Plexus

Ilioinguinal nerve:
L1.
Travels lateral to psoas major.
Innervates:
Skin of groin.
Scrotum.
Labia.
Lumbar Plexus

Genitofemoral nerve (L1-2.):
Travels through psoas major.
Divides into genital and femoral branches.

Lateral femoral cutaneous nerve (L2-3.):
Travels lateral to psoas major.

Femoral nerve (L2-4):
Largest branch of lumbar plexus.
Travels lateral to psoas major.
Lumbar Plexus

Obturator nerve (L2-4):
Travels medial to psoas major.
To adductor muscles of lower extremity.

Accessory obturator nerve (L3-4):
Travels medial to psoas major.
To pectineus muscle.
Nerves of Abdominal Wall

Thoracoabdominal nerves (T7-T11):
Innervate anterior abdominal muscles,
overlying skin and peripheral diaphragm.
Anterior cutaneous nerves.
Lateral cutaneous nerves.
Subcostal nerve (T12):
Inferior external oblique and skin over anterior
superior iliac spine and hip.
Thoracic Sympathetic Trunk

Greater splanchnic nerve (T5-9):
Celiac ganglia:
Prevertebral.
Superior to celiac trunk.
Celiac plexus:
Sympathetic to: stomach, duodenum, ileum,
jejunum, spleen, pancreas, gall bladder,
kidneys, suprarenal glands.
Hepatic plexus:
Sympathetic to liver.
Thoracic Sympathetic Trunk

Lesser splanchnic nerve (T10-11):
Superior mesenteric ganglia:
Prevertebral.
Superior mesenteric plexus:
Sympathetic to: duodenum, ileum, jejunum,
cecum, vermiform appendix, ascending colon,
transverse colon, pancreas.
Thoracic Sympathetic Trunk

Least splanchnic nerve (T12):
Aorticorenal ganglia:
Prevertebral.
Sympathetic to: kidneys, suprarenal glands.
Abdominal Sympathetic Trunk
Paravertebral.
 Continuous with thoracic sympathetic
trunk.
 Lumbar splanchnic nerves (T11-L2):

Inferior mesenteric ganglion (prevertebral).
Superior hypogastric plexus:
Sympathetic innervation to descending colon
and sigmoid colon.