Which organ is lies on posterior wall of abdomen?
The posterior abdominal wall primarily serves as protection for the retroperitoneal organs. It is mostly muscular contributed by the diaphragm, paraspinal, quadratus lumborum, iliacus, and psoas muscles.
What artery supplies posterior abdominal wall?
Blood supply The branches to the posterior abdominal wall are paired inferior phrenic arteries and lumbar arteries. The inferior vena cava receives the lumbar veins draining the lateral and posterior abdominal wall.
What is posterior to the abdomen?
The posterior surface of the stomach is related to the left hemidiaphragm, the spleen, the left kidney (and adrenal), and the pancreas (stomach bed). Few peritoneal bands may be present between the posterior surface of the stomach and the anterior surface of the pancreas.
What muscle forms the posterior wall?
The diaphragm forms the superior and much of the posterior border of the posterior abdominal wall. In addition, the psoas major, iliacus, and quadratus lumborum muscles form the posterior abdominal wall. These muscles function in respiration (diaphragm) as well as trunk and lower limb motion.
Which arteries do not supply the posterior abdominal wall?
In the posterior abdominal wall, other important vessels that are not arteries include:
- IVC is formed by the union of the two common iliac veins just to the right of L5.
- The cisterna chyli, formed by the lumbar and intestinal lymphatics, lies just posterior and to the right of the aorta.
What posterior abdominal wall muscle is both a trunk and hip flexor?
The psoas major is a long fusiform (spindle-shaped) muscle located on the side of the lumbar spine and attaches to the brim of the lesser pelvis. The psoas major assists with both flexion and external rotation of the hip joint and joins the iliacus to form the iliopsoas.
What is posterior to abdominal aorta?
The posterior branches are the lumbar arteries (one pair for each lumbar vertebra) and the middle sacral artery (arising at the aortic bifurcation). Clinically, the abdominal aorta is frequently divided into supra (above) and infra (below) renal artery segments.
What marks the inferior limit of the posterior abdominal wall?
The ilium is the largest of the three bones that merge to form the hip bone. The iliac crest is the curved superior border of the ilium. The iliac crest also forms the inferior boundary of the posterior abdominal wall.
What muscle completes the posterior abdominal wall superiorly?
The iliacus muscle is a fan-shaped muscle that is situated inferiorly on the posterior abdominal wall. It combines with the psoas major to form the iliopsoas – the major flexor of the thigh.
Where is the posterior abdominal wall?
The posterior layer extends between the 12th rib and the iliac crest posteriorly. Laterally the fascia meets the internal oblique and transversus abdominis muscles, but not the external oblique. As it forms these attachments it covers the latissimus dorsi.
Are the kidneys lateral to the abdominal aorta?
The right renal artery originates from the anterolateral aspect of the aorta and runs in an inferior course behind the inferior vena cava to reach the right kidney, while the left renal artery originates slightly higher and from a more lateral aspect of the aorta, and runs almost horizontally to the left kidney.
Is diaphragm part of posterior abdominal wall?
The posterior abdominal wall consists of several muscles: the diaphragm, psoas major, psoas minor, iliacus, and quadratus lumborum. The diaphragm is an important respiratory muscle and forms the upper boundary of the posterior abdominal wall.
What are the muscles of the posterior abdominal wall?
The muscles of the posterior abdominal wall are active during flexion of the of the thigh (psoas and iliacus), extension and lateral flexion of the trunk (quadratus lumborum), fixation of the 12th rib during respiration (quadratus lumborum), and compression of the abdominal contents (transversus abdominis).
Where is the anterior rami of the posterior abdominal wall?
Innervation: Anterior rami of T12- L4 nerves. The psoas major is located near the midline of the posterior abdominal wall, immediately lateral to the lumbar vertebrae. Attachments: Originates from the transverse processes and vertebral bodies of T12 – L5.
Where is the quadratus lumborum located in the abdominal wall?
Posterior Abdominal Muscles. The quadratus lumborum muscle is located laterally in the posterior abdominal wall. It is a thick muscular sheet which is quadrilateral in shape. The muscle is positioned superficially to the psoas major. Attachments: It originates from the iliac crest and iliolumbar ligament.
Which is part of the posterior abdominal wall contains the kidney?
Posterior abdominal wall… 3. Introduction.. Posterior abdominal wall is muscular and support not only the retroperitoneal organs like kidney, ureter, duodenum but all the other organs and vessels etc. of biggest cavity of the body. It contains the lumbar plexus and part of the course of its branches.