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Posterior abdominal wall Dr. Zahiri In the name of God.

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1 Posterior abdominal wall Dr. Zahiri In the name of God

2 consists of: fasciae, muscles and their vessels and spinal nerves. & several viscera : kidneys, suprarenal (adrenal) glands, pancreas, ureters Dr. Maria Zahiri

3 lumbar vertebrae five vertebrae between the rib cage and the pelvis. They are the largest segments of the vertebral column The lumbar vertebrae help support the weight of the body, and permit movement Dr. Maria Zahiri

4 Iliac fossa Last ribs Dr. Maria Zahiri


6 Muscles: PSOAS MAJOR Morphology: is a long fusiform muscle Location: on the side of the lumbar region of the vertebral column and brim of the lesser pelvis. Junction: It joins the iliacus muscle to form the iliopsoas. In less than 50 percent of human subjects, the psoas major is accompanied by the psoas minor. Dr. Maria Zahiri

7 Muscles: PSOAS MAJOR Origion: transverse processes of lumbar vertebrae I-V. Insertion lesser trochanter of the femur. Dr. Maria Zahiri

8 Psoas minor Origion: the last thoracic and first lumbar vertebrae. Insertion: iliopectineal eminence. Dr. Maria Zahiri

9 Iliacus Origion: iliac fossa on the interior side of the hip bone Insertion: lesser trochanter of the femur Dr. Maria Zahiri


11 Quadratus lumborum Origin: from the lower border of the last rib by four small tendons from the apices of the transverse processes of the upper four lumbar vertebrae Insertion: the internal lip of the iliac crest for about 5 cm., Dr. Maria Zahiri

12 diaphragm is a dome-shaped musculofibrous septum separates the thoracic from the abdominal cavity, Its peripheral part consists of muscular fibers that take origin from the circumference of the inferior thoracic aperture and converge to be inserted into a central tendon. Dr. Maria Zahiri

13 Part Origin The muscular fibers may be grouped according to their origins into three parts: Sternal: two muscular slips from the back of the xiphoid process. Costal: The inner surfaces of the cartilages and adjacent portions of the lower six ribs on either side, interdigitating with the Transversus abdominis. Lumbar: Aponeurotic arches, named the lumbocostal arches, and from the lumbar vertebrae by two pillars or crura. There are two lumbocostal arches, a medial and a lateral, on either side. Dr. Maria Zahiri

14 Crura and central tendon At their origins the crura(crus) are tendinous in structure The retrocrural area is the area behind the crus of the diaphragm. The central tendon of the diaphragm is a thin but strong aponeurosis situated near the center of the vault formed by the muscle Dr. Maria Zahiri

15 Diaphragm Dr. Maria Zahiri


17 Blood supply Dr. Maria Zahiri


19 Thoracolumbar fascia (lumbodorsal fascia Is a deep investing membrane covers the deep muscles of the back of the trunk It is made up of three layers, anterior, middle, and posterior. The anterior layer is the thinnest The posterior layer is the thickest. Two spaces are formed between these three layers of the fascia. Between the anterior and middle layer lies the quadratus lumboru muscle. The erector spinae muscle is enclosed between the middle and posterior layers. Dr. Maria Zahiri

20 The posterior layer to the spines of the lumbar and sacral vertebrae The middle layer is attached medially to the tips of the transverse processes of the lumbar vertebrae The anterior layer covers quadratus lumborum Dr. Maria Zahiri


22 Urinary System Kidneys: Kidneys are retroperitoneal. Lie against posterior abdominal wall on either side of vertebral column. Generally lie adjacent to upper three lumbar vertebrae. Dr. Maria Zahiri

23 Relation of kidney( ant.) Dr. Maria Zahiri

24 Relation of kidney( pos.) Dr. Maria Zahiri Diaphragm Transversus abdominis Quadratus lumborum Psoas major

25 Dr. Maria Zahiri lateroconal fascia Renal fascia or Gerota's fascia Ant. Layer of renal fascia(fascia of Toldt) Pos. Layer of renal fascia(Zuckerkandl's fascia))

26 Dr. Maria Zahiri

27 kidney Subdivisions: Cortex. Medulla with renal pyramids Pelvis major and minor calyces (calyx) Dr. Maria Zahiri

28 Blood supply of kidney Right and left renal arteries: Right is longer than the left. Extrahilar arteries Right and left renal veins: Left is longer than the right Dr. Maria Zahiri

29 Ureter is a continuation of the pelvis. Descends retroperitoneally on the anterior surface of the psoas major. Passes anterior to bifurcation of common iliac. Dr. Maria Zahiri

30 Blood supply of ureters Dr. Maria Zahiri

31 Suprarenal (adrenal) glands: Lie against posterior abdominal wall on superior poles of kidneys. Arterial supply: Superior suprarenal arteries: From inferior phrenic artery. Middle suprarenal artery: From abdominal aorta. Inferior suprarenal arteries: From renal artery Dr. Maria Zahiri


33 Venous drainage: Right suprarenal vein to inferior vena cava. Left suprarenal vein to renal vein. Dr. Maria Zahiri


35 شاد و سلامت باشید

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