What are the anatomic features of the external oblique muscles in relation to abdominal hernias?

Updated: Jul 01, 2021
  • Author: Assar A Rather, MBBS, MD, FACS; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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The external oblique muscle originates on the lower eight ribs, with obliquely and inferiorly directed fascicles inserting into its aponeurosis. Deep to the external oblique muscle is the internal oblique muscle, with obliquely and superiorly oriented fascicles arising from the iliac fascia deep to the lateral half of the inguinal ligament, the anterior two thirds of the iliac crest, and the lumbodorsal fascia. The internal oblique muscle inserts into its aponeurosis, the rectus sheath, and the lower ribs and cartilages superiorly.

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