Obliquus abdominis internus

OBLIQUUS ABDOMINIS INTERNUS

Obliquus abdominis internus (internal oblique muscle)

  • It is situated under the preceding and consists of muscular and aponeurotic portions. The aponeurotic part is blended with that of the external oblique muscle. Its fibres are directed downwards, forwards and inwards. It occupies the entire space bound by the last rib, the free extremities of the transverse processes of the lumbar vertebra and the external angle of the ilium.
  • Origin: Lateral angle of ilium and the adjacent part of the poupart’s ligament.
  • Insertion: Linea alba, prepubic tendon and posterior border of the last rib.

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Last modified: Thursday, 3 May 2012, 5:18 AM