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THORACO-LUMBAR FASCIA

THORACO-LUMBAR FASCIA. LUMBAR FASCIA (deep fascia)- It encloses deep muscles of the back. 3layers-1)posterior-thickest. 2)middle-thicker 3)anterior-thinnest. Features- 1)It has 3 strong layers-fills up the gap between the 12 th rib and the iliac crest.

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THORACO-LUMBAR FASCIA

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  1. THORACO-LUMBAR FASCIA

  2. LUMBAR FASCIA (deep fascia)- • It encloses deep muscles of the back. • 3layers-1)posterior-thickest. • 2)middle-thicker • 3)anterior-thinnest.

  3. Features- • 1)It has 3 strong layers-fills up the gap between the 12th rib and the iliac crest. • 2)Between posterior and middle layers-erector spinae and transversusspinalis muscles. • 3)Between the middle and anterior layers-quadratuslumborum muscle. • 4)The three layers form a dense aponeurotic sheet-origin to the internal oblique and transversusabdominis muscles.

  4. Extent- • Posterior layer-It covers the loin area, back of thorax and neck. • Middle and anterior layer-It covers the lumbar region.

  5. Anterior layer- • Medially- Anterior surface of the lumbar transverse processes. • Laterally-It blends with the middle layer at the lateral border of the quadratuslumborum. • Superiorly-lateral arcuate ligament-tip of • Transverse process L1to 12th rib. • Inferiorly-inner lip of iliac crest and the ilio-lumbar ligament.

  6. Middle layer- • Medially-Tips of the lumbar transverse processes and inter-transverse ligaments. • Laterally-It blends with the anterior layer at the lateral border of the quadratuslumborum. • Superiorly-lower border of the 12th rib and lumbocostal ligament. • Inferiorly-intermediate area of the iliac crest.

  7. Posterior layer- • Medially-lumbar and sacral spines and interspinous ligaments. • Laterally-blends with middle layer at the lateral border of the erector spinae. • Superiorly-back of thorax- lumbar vertebral spines. • Inferiorly-outer lip of the iliac crest.

  8. Thoracic part- • Medially-Spines of thoracic vertebrae. • Laterally-Angles of the ribs. • Above- It extends into the cervical region deep to the serratus posterior superior to fuse with the fascia of the neck.

  9. COELIAC GANGLIA- • Largest ganglia in the body on either sides of coeliac trunk. • Irregular shape. • Larger upper part-greater splanchnic nerve. • Smaller lower part-aortico-renal-lesser splanchnic nerve.

  10. COELIAC PLEXUS OR SOLAR PLEXUS-related to coeliac ganglion. • SITUATION-on aorta around the coeliac trunk, • and root of superior mesenteric artery.

  11. FIBERS FORMING THE PLEXUS- • 1.Pre-ganglionic sympathetic fibres-through greater and lesser splanchnic nerves. • 2.Post-ganglionic sympathetic fibres-arising in the coeliac ganglion. • 3.Pre-ganglionic vagalfibres-posterior vagal trunk through the right and the left vagus nerves. • 4.sensory fibres from the diaphragm along the inferior phrenic arteries.

  12. BRANCHES- • coeliac plexus forms a number of secondary branches which surround the aorta. • 1)Phrenic plexus- • Along the inferior phrenic artery to the suprarenal gland. • 2)Hepatic plexus- around liver,gall bladder and bile ducts.

  13. 3)Left gastric plexus to stomach. • 4)Splenic plexus to spleen. • 5)Suprarenal plexus-pre-ganglionicfibres end in the chromaffin cells of the suprarenal gland. • 6)Renal plexus-It is formed by the coeliacplexus,aorticorenal,lowest thoracic splanchnicnerve,first lumbar splanchnic nerve and aortic plexus. • It supplies kidney,upper part of ureter.

  14. 7)Testicular plexus- • It supplies-testis,epididymis,and vas deferens. • 8)ovarian plexus- • ovary and uterine tube. • 9)superior mesenteric plexus- • It contains superior mesenteric ganglion. • It supplies the territory of superior mesenteric artery.

  15. 10)Inferior mesenteric plexus- • It is formed by the aortic plexus. • It is distributed to the territory of the inferior mesenteric artery.

  16. Thank u

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