Rectus abdominis muscle
Updates to Article Attributes
Body
was changed:
The rectus abdominis muscle is strap-like in appearance and forms part of the anterior abdominal wall and is enclosed by the rectus sheath.
Summary
- origin: pubic symphysis, tubercle and crest
-
insertion:
xiphisternumxiphisternum and 5th-to-7th costal cartilages -
blood supply:
superiorsuperior and inferior epigastric arteries - nerve supply: anterior rami of T6-L1 spinal nerves
- action: supports abdominal viscera, compression of the abdomen, trunk movement
Gross anatomy
The rectus abdominis has three-to-four tendinous intersections that divide the muscle into segments, which are often incomplete posteriorly. It is divided into two halves by the linea alba. Laterally, the rectus sheath fuses to form the linea semilunaris.
-<strong>origin:</strong> <a href="/articles/symphysis-pubis">pubic symphysis</a>, tubercle and crest</li>- +<strong>origin:</strong> <a href="/articles/pubic-symphysis">pubic symphysis</a>, tubercle and crest</li>
-<strong>insertion:</strong> xiphisternum and 5th-to-7th costal cartilages</li>- +<strong>insertion:</strong> <a title="Xiphisternum" href="/articles/xiphisternum">xiphisternum</a> and 5th-to-7th <a title="Costal cartilages" href="/articles/costal-cartilage">costal cartilages</a>
- +</li>
-<strong>blood supply:</strong> superior and inferior epigastric arteries</li>- +<strong>blood supply:</strong> <a title="Superior epigastric arteries" href="/articles/superior-epigastric-artery-1">superior </a>and <a title="Inferior epigastric arteries" href="/articles/inferior-epigastric-artery">inferior epigastric arteries</a>
- +</li>
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