| Abdominal internal oblique muscle | |
|---|---|
 The abdominal internal oblique muscle. | |
 Muscles of the trunk. | |
| Details | |
| Origin | Inguinal ligament, iliac crest and the lumbodorsal fascia |
| Insertion | Linea alba, pectineal line of pubis (via conjoint tendon) and ribs 10-12. |
| Artery | Subcostal arteries |
| Nerve | Thoracoabdominal nn. (T7-T11), subcostal n. (T12), iliohypogastric n. (L1) and ilioinguinal n. (L1) |
| Actions | Bilateral: Compresses abdomen Unilateral: Ipsilateral trunk rotation |
| Identifiers | |
| Latin | musculus obliquus internus abdominis |
| TA98 | A04.5.01.017 |
| TA2 | 2373 |
| FMA | 13891 |
| Anatomical terms of muscle | |
The abdominal internal oblique muscle, also internal oblique muscle or interior oblique, is an abdominal muscle in the abdominal wall that lies below the external oblique muscle and just above the transverse abdominal muscle.