Presentation on theme: "Posterior abdominal wall"— Presentation transcript:
1Posterior abdominal wall In the name of GodPosterior abdominal wallDr. Zahiri
2Dr. Maria Zahiriconsists of: fasciae, muscles and their vessels and spinal nerves. & several viscera : kidneys, suprarenal (adrenal) glands, pancreas, ureters
3lumbar vertebrae five vertebrae between the rib cage and the pelvis. Dr. Maria Zahirilumbar vertebraefive 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
6Muscles: PSOAS MAJOR Morphology: is a long fusiform muscle Location: Dr. Maria ZahiriMuscles: PSOAS MAJORMorphology:is a long fusiform muscleLocation: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.
7Muscles: PSOAS MAJOR Origion: Dr. Maria ZahiriMuscles: PSOAS MAJOROrigion:transverse processes of lumbar vertebrae I-V.Insertionlesser trochanter of the femur.
8Psoas minor Origion: the last thoracic and first lumbar vertebrae. Dr. Maria ZahiriPsoas minorOrigion: the last thoracic and first lumbar vertebrae.Insertion:iliopectineal eminence.
9Iliacus Origion: iliac fossa on the interior side of the hip bone Dr. Maria ZahiriIliacusOrigion: iliac fossa on the interior side ofthe hip boneInsertion:lesser trochanter of the femur
11Quadratus lumborum Origin: from the lower border of the last rib Dr. Maria ZahiriQuadratus lumborumOrigin:from the lower border of the last ribby four small tendons from the apicesof the transverse processes of theupper four lumbar vertebraeInsertion:the internal lip of the iliac crestfor about 5 cm.,
12diaphragm is a dome-shaped musculofibrous septum Dr. Maria Zahiridiaphragmis a dome-shaped musculofibrous septumseparates 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.
13Dr. Maria ZahiriPart OriginThe 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.
14Crura and central tendon Dr. Maria ZahiriCrura and central tendonAt their origins the crura(crus) are tendinous in structureThe 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
19Thoracolumbar fascia (lumbodorsal fascia Dr. Maria ZahiriThoracolumbar fascia (lumbodorsal fasciaIs a deep investing membranecovers the deep muscles of the back of the trunkIt is made up of three layers, anterior, middle, and posterior. The anterior layer is the thinnestThe 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.
20to the spines of the lumbar and sacral vertebrae The middle layer Dr. Maria ZahiriThe posterior layerto the spines of the lumbar and sacral vertebraeThe middle layeris attached medially to the tips of the transverse processes of the lumbar vertebraeThe anterior layer covers quadratus lumborum
27kidney Subdivisions: Cortex. Medulla with renal pyramids Pelvis Dr. Maria ZahirikidneySubdivisions:Cortex.Medulla with renal pyramidsPelvismajor and minor calyces (calyx)
28Blood supply of kidney Right and left renal arteries: Dr. Maria ZahiriBlood supply of kidneyRight and left renal arteries:Right is longer than the left.Extrahilar arteriesRight and left renal veins:Left is longer than the right
29Ureter is a continuation of the pelvis. Dr. Maria ZahiriUreteris a continuation of the pelvis.Descends retroperitoneally on the anterior surface of the psoas major.Passes anterior to bifurcation of common iliac.
30Blood supply of ureters Dr. Maria ZahiriBlood supply of ureters
31Suprarenal (adrenal) glands: Dr. Maria ZahiriSuprarenal (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