External oblique
| part of anterior abdominal wall | |
|---|---|
| Action | Flexion of trunk |
| Origin | Muscular slips from the outer surfaces of the lower eight ribs (ribs V to XII) |
| Insertion | Lateral lip of iliac crest; aponeurosis ending in midline raphe (linea alba) |
| Innervation | Anterior rami of T7-T12 |
Aponeurosis forms inguinal ligament
Other components of anterior abdominal wall:
- Internal oblique
- Transversus abdominis
- Transversalis