Rectus abdominis muscle
Citation, DOI, disclosures and article data
At the time the article was created Henry Knipe had no recorded disclosures.View Henry Knipe's current disclosures
At the time the article was last revised Mostafa Mohamed had no recorded disclosures.View Mostafa Mohamed's current disclosures
The rectus abdominis muscle is strap-like in appearance and forms part of the anterior abdominal wall and is enclosed by the rectus sheath.
- origin: pubic symphysis, tubercle and crest
- insertion: xiphisternum and 5th-7th costal cartilages
- action: supports abdominal viscera, compression of the abdomen, trunk movement
- blood supply: superior and inferior epigastric arteries
- innervation: anterior rami of T6-L1 spinal nerves
The rectus abdominis has three-to-four horizontal tendinous intersections that divide the muscle into segments, which are often incomplete posteriorly. It is divided into two halves by the vertical linea alba. Laterally, the rectus sheath fuses to form the linea semilunaris.
- 1.Rosse C, Gaddum-Rosse P. Hollinshead's textbook of anatomy. Lippincott Williams & Wilkins. (1997) ISBN:0397512562. Read it at Google Books - Find it at Amazon