Anatomy of Abdominal Wall

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 YuniartiAnatomy departmentFaculty of Medicine

UNISBA

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Although the abdominal wall is continuous, it is subdivided into theanterior wall, right and left lateral walls, and posterior wall fordescriptive purposes

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 The wall is musculoaponeurotic, except for the posterior wall, whichincludes the lumbar region of the vertebral column.

 The boundary between the anterior and the lateral walls is indenite,therefore the term anterolateral abdominal wall is often used.

 The anterolateral abdominal wall consists of skin and subcutaneoustissue (supercial fascia) composed mainly of fat, muscles and theiraponeuroses and deep fascia, extraperitoneal fat, and parietal

peritoneum

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 The anterolateral abdominal wall is bounded superiorly by the cartilages of theth!"#th ribs and the xiphoid process of the sternum, and inferiorly by theinguinal ligament and the superior margins of the anterolateral aspects of thepelvic girdle (iliac crests, pubic crests, and pubic symphysis)

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•$usculophrenic artery•%uperior epigastric artery•"#th & ""th intercostal artery•%ubcostal artery•'nferior epigastric artery•

eep circumex illiac artery•%upercial circumex illiac artery•%upercial epigastric artery

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%upercial lymphatic vessels

accompany the subcutaneousveins* those superior to thetransumbilical plane drainmainly to the axillary lymphnodes* however, a few drainto the parasternal lymphnodes. %upercial lymphaticvessels inferior to thetransumbilical plane drain tothe supercial inguinal lymphnodes.eep lymphatic vessels

accompany the deep veins ofthe abdominal wall and drainto the external iliac, commoniliac, and right and left lumbar(caval and aortic) lymphnodes

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The posterior abdominal wall is mainlycomposed of the:

• +ive lumbar vertebrae and associated ' discs (centrally).

• -osterior abdominal wall muscles

• iaphragm, which contributes to the superior part of the posterior wall.

• +ascia, including the thoracolumbar fascia.

• umbar plexus, composed of the anterior rami of lumbar spinal nerves.

• +at, nerves, vessels (e.g., aorta and '/), and lymph nodes.

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anterior

lateral

posterolateral

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