This consists of bones, ligaments, muscles and other structures which form the posterior abdominal wall behind the peritoneal cavity.

Bones

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Lumbar vertebrae (L1-5)

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Intervertebral joints (L1-5)

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Lumbosacral joint

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Sacrum

Muscles

Muscles of the posterior abdominal wall are as follows

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Diaphragm

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Iliacus

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Psoas minor

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Quadratus lumborum

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Psoas major

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Erector spinae

Fasciae of the posterior abdominal wall are

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Thoracolumbar fascia

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Psoas sheath

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Fascia iliaca

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Diaphragmatic fascia

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Median arcuate ligament

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Medial arcuate ligament

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Lateral arcuate ligament

Arteries

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Subcostal artery

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Abdominal aorta and branches

The abdominal aorta has 4 groups of branches

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1.Unpaired branches to the alimentary tract
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Celiac trunk for the abdominal part of foregut

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Superior mesenteric artery for the midgut

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Inferior mesenteric artery for the hindgut

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2.Paired branches to the viscera
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Middle suprarenal artery

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Renal artery

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Gonadal artery (testicular/ovarian)

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3.Paired branches to the abdominal wall
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Inferior phrenic artery

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1st lumbar artery

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2nd lumbar artery

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3rd lumbar artery

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4th lumbar artery

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4.Terminal branches
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Common iliac arteries (left and right)

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Median sacral artery.

Veins

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Inferior vena cava and its tributaries
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Common iliac vein

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3rd lumbar vein

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4th lumbar vein

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Right gonadal (testicular/ovarian) vein

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Renal veins (right and left)

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Azygos vein

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Right suprarenal vein

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Inferior phrenic veins (right and left)

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Hepatic veins (right and left)

Other veins are

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Subcostal vein

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Ascending lumbar vein

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Internal vertebral venous plexuses

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1st lumbar vein

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2nd lumbar vein

The 1st and 2nd lumbar veins join the ascending lumbar vein.

Nerves

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Sympathetic trunk

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Subcostal nerve

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Lumbar nerves (L1-5), which form the
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Lumbar plexus
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L1 nerve

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L2 nerve

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L3 nerve

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L4 nerve

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L5 nerve
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Lumbosacral trunk

Organs

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Kidneys

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Suprarenal glands

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Cisterna chyli or abdominal confluence of lymph ducts

 
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Creator: Oluwole Ogunranti


Muscles of posterior abdominal wall 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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