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Muscles of the posterior abdominal wall. The posterior abdominal wall is formed by the lumbar vertebrae, parts of the ilia of the hip bones, psoas major and iliacus muscles, and quadratus lumborum muscle. This part of the core plays a key role in stabilizing the rest of the body and maintaining posture.
Anatomy photo:35:10-0100 at the SUNY Downstate Medical Center – "Anterior Abdominal Wall: The Rectus Abdominis Muscle" Cross section image: pembody/body12a—Plastination Laboratory at the Medical University of Vienna "Anatomy diagram: 25466.180-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2012-09-03.
The rectus abdominis is the most well-known, often referred to as the “six-pack” muscle, and runs vertically along the front of the abdomen. This muscle plays a role in stabilizing the pelvis ...
The transverse abdominal muscle (TVA), also known as the transverse abdominis, transversalis muscle and transversus abdominis muscle, is a muscle layer of the anterior and lateral (front and side) abdominal wall, deep to (layered below) the internal oblique muscle.
The boundary of the abdominal cavity is the abdominal wall in the front and the peritoneal surface at the rear. In vertebrates, the abdomen is a large body cavity enclosed by the abdominal muscles, at the front and to the sides, and by part of the vertebral column at the back. Lower ribs can also enclose ventral and lateral walls.
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It is the deepest abdominal muscle, and commonly referred to as a back muscle. Each muscle of the pair is an irregular quadrilateral in shape, hence the name. The quadratus lumborum muscles originate from the wings of the ilium ; their insertions are on the transverse processes of the upper four lumbar vertebrae plus the lower posterior border ...
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