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Internal Oblique
Region: Abdominal & Pelvic Muscles · All abdominal & pelvic muscles
Internal Oblique at a glance
| Origin | Inguinal ligament, iliac crest and thoracolumbar fascia |
|---|---|
| Insertion | Lower ribs 10–12, linea alba and pubic crest (conjoint tendon) |
| Actions | Rotates the trunk to the same side; Flexes and side-bends the trunk; Compresses the abdomen |
| Nerve supply | Lower intercostal nerves and iliohypogastric/ilioinguinal nerves (L1) |
◆ Good to know
Its fibres run at right angles to the external oblique; together with transversus it forms the conjoint tendon reinforcing the inguinal canal's back wall.
More Abdominal & Pelvic Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.