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NEUROLOGY of ABDOMINAL REGION

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.

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NEUROLOGY of ABDOMINAL REGION

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  1. NEUROLOGYofABDOMINAL REGION

  2. 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.

  3. 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)

  4. Lumbar Plexus • Iliohypogastrric nerve: L1. Travels lateral to psoas major. Innervates: Lateral buttock. Hypogastric region.

  5. Lumbar Plexus • Ilioinguinal nerve: L1. Travels lateral to psoas major. Innervates: Skin of groin. Scrotum. Labia.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. Thoracic Sympathetic Trunk • Least splanchnic nerve (T12): Aorticorenal ganglia: Prevertebral. Sympathetic to: kidneys, suprarenal glands.

  12. 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.

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