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Somatic and autonomic plexuses of abdominopelvic cavity Lymphatic drainage of GI tract Lymph from viscera enters pre-aortic lymph nodes: - Foregut: celiac nodes - Midgut: superior mesenteric nodes - Hindgut: inferior mesenteric nodes Nervous system: Divisions Structural Central nervous system - Brain - Spinal cord Peripheral nervous system - Spinal nerves (components ? & numbers?) - Cranial nerves (…? …?) - Autonomic nerves (…? …?) Functional Somatic - Spinal nerves Nuclei & fibers? - Cranial nerves Nuclei & fibers? Autonomic - Sympathetic Nuclei & fibers? - Parasympathetic Nuclei & fibers? Autonomic plexuses of abdominopelvic cavity Contains - Sympathetic fibers Nuclei; spinal cord lateral horn T1- L2 Fibers: from sympathetic chain - Parasympathetic fibers Nuclei; vagal nucleus, spinal cord lateral horn S2-4 Fibers: from vagus and pelvic splanchnic nerves - Visceral sensory Autonomic plexus of abdomen - Sympathetic functions Inhibitor of GI contraction Motor of sphincter Vasoconstrictor (in viscera) Vasodilator (in muscles) Bronchodilator Secretomotor Erector pilorum Autonomic plexus of abdomen Parasympathetic Functions Motor to GI tract - Inhibitor of GI sphincters - Secretomotor - Motor to urinary bladder & rectum - Vasodilator to the arteries of: Penis & clitoris Testes & ovaries Uterus & its tubes - Autonomic plexus of abdomen Includes Ganglia - Nerves - Autonomic plexus of abdomen Ganglia • Parasympathetic - Over the viscera • Sympathetic - Sympathetic chain - Celiac - Aorticorenal - Superior mesenteric - Inferior mesenteric Pre & post ganglionic fibers Sympathetic chain ganglia Cervical 3 Thoracic 11 Lumbar 4 Sacral 4 Impar 1 Autonomic plexus of abdomen Sympathetic nerves Greater splanchnic From thoracic ganglia 5-9 (10) - To celiac ganglion • Lesser splanchnic - From thoracic ganglia 9-10 (11) - To aorticorenal ganglion • Lowest splanchnic - From thoracic ganglion 11 - To renal plexus • - Autonomic plexus of abdomen • - • • - Sympathetic nerves Lumbar splanchnic From lumbar ganglia 1st & 2nd To celiac, renal & aortic plexuses Lumbar splanchnic From lumbar ganglia 3rd & 4Th To superior hypogastric plexus Sacral splanchnic From sacral ganglia To inferior hypogastric plexus Autonomic plexus of abdomen • • Parasympathetic nerves Vagus nerves Pelvic splanchnic nerves Autonomic plexus of abdomen - - Celiac plexus Largest autonomic plexus Around celiac trunk Has two celiac ganglia Received fibers from: both greater & lesser splanchnic of two sides, both vagi & phrenic nerve Extend as neumerous secondary plexuses Autonomic plexus of abdomen - Lower part named aorticorenal ganglion Receive lesser splanchnic nerve Forms renal plexus Autonomic plexus of abdomen - Secondary plexuses Phrenic Hepatic Splenic Left gastric Suprarenal Renal Ureteric plexus Aortic Autonomic plexus of abdomen - - Secondary plexuses Superior mesenteric Inferior mesenteric Superior hypogastric plexus Inferior (pelvic ) hypogastric Superior & Middle rectal plexuses Inferior rectal nerve Vesical plexus Prostatic plexus Urogenital plexus Autonomic plexus of abdomen - Phrenic plexus Receive phrenic N. To : IVC & Suprarenal gland Autonomic plexus of abdomen - Hepatic plexus Receive fibers from vagi & rt. Phrenic Accompanies hepatic art. & portal V. To: liver ,gall bladder, bile duct, Pylorus, 1st duodenum , stomach, 2nd duodenum & pancreas Autonomic plexus of abdomen Lt. Gastric plexus - Receive gastric branch of vagus - To stomach - Sympathetic : Motor pyloric sphincter Inhibitor to gastric musculature Autonomic plexus of abdomen Splenic plexus Formed by : - Celiac plexus - Rt. Vagus - Perhaps wholly sympathetic to VV & capsule Autonomic plexus of abdomen Suprarenal plexus Formed by: - Celiac plexus - Greater splanchnic - Contains pre & postganglionic fibers Autonomic plexus of abdomen Renal plexus Formed by: - Celiac plex. - Aorticorenal ganglion - Lowest splanchnic nerve - Aortic plex. - To : vessels, Tubules , Glomeruls Autonomic plexus of abdomen Uretric plexus Formed by: - Renal plex. - Aortic plex. - Hypogastric plex. - Motor fibers Sympathetic: vasomotor Parasympathetic: vasodilator Autonomic plexus of abdomen Superior mesenteric plexus Formed by : - Celiac & Rt. Vagus - Has a ganglion Sympathetic - Motor to iliocecal valve Inhibitor to musculature - Vasoconstrictor Autonomic plexus of abdomen Aortic (intermesenteric) plexus Formed by: - Celiac plexus - Lumbar splanchnic - Connect to sup. Mesenteric - To :IVC Autonomic plexus of abdomen Inferior mesenteric Formed by: - Aortic plexus - 2nd lumbar splanchnic - Pelvic splanchnic - Has inf. mesenteric ganglion Autonomic plexus of abdomen Superior hypogastric plexus Anterior & around to the aortic bifurcation Formed by: - Aortic plexus - 3th & 4th lumbar splanchnic - pelvic splanchnic divides into RT.& LT. Supplies - Uretric plexus - Testicular plexus - Ovarian plexus - Common iliac plexus Pelvic autonomic plexus Inferior (pelvic ) hypogastric Formed by: - Rt. & LT. Hypogastric - Thoracic splanchnic? - Lumbar splanchnic Pelvic splanchnic - Sacral splanchnic - Pelvic autonomic plexus Superior & Middle rectal plexuses. Inferior rectal nerve Sympathetic - Motor to anal sphincter - Inhibitor to musculature Autonomic plexus of abdomen Vesical plexus - To bladder , seminal vesicle & ductus deferense - Parasympathetic Motor to musculature Inhibitor to sphincter Autonomic plexus of abdomen Prostatic plexus To prostate, Seminal vesicle, Urethra, Corpora spongiosum & cavernosum Autonomic plexus of abdomen Urogenital plexus - To vagina, Uterus, Uterine tube - Sympathetic Vasoconstrictor Motor to musculature - Parasympathetic Vasodilator Inhibitor musculature Lumbar plexus Spinal nerve has: - Dorsal (sensory) root - Ventral (motor) root - Gray communicating - White communicating (T1-L2) Spinal nerve divides into: - Anterior & posterior branches Lumbar plexus - There are 31 pair of spinal nerves Cervical 8 Thoracic 12 Lumbar 5 Sacral 5 Coccygeal 1 Lumbar plexus - Formed by T12-L4 Branches Iliohypogastric L1 Ilioinguinal L1 Genitofemoral L1&L2 Lateral femoral cutaneous nerve L2&3 Lumbar plexus - Branches Femoral L2- 4 Obturator L2- 4 Accessory obturator L3& 4 Lumbosacral trunk (L4- L5) Sacral and coccygeal plexuses - Sacral plexus Formed by L4-S4 Coccygeal plexus Formed by S4- Co