What is the anatomy of the paired rectus abdominis muscles in relation to abdominal hernias?

Updated: Jul 23, 2019
  • Author: Assar A Rather, MBBS, MD, FACS; Chief Editor: John Geibel, MD, DSc, MSc, AGAF  more...
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Answer

The paired rectus abdominis muscles originate on the pubis inferiorly and insert on the ribs superiorly. The muscle has four transversely oriented tendinous bands, variably spaced. At the lateral margin of the rectus abdominis muscles is the linea semilunaris, where the aponeurosis serves as an insertion for the lateral musculature. The lower edge of the posterior sheath, midway between the umbilicus and the pubis with its concavity oriented toward the pubis, defines the semicircular line.


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