EXTERNAL OBLIQUES

• Origin

External surfaces of lower eight ribs

• Insertion

Anterior iliac crest and linea alba

• Agonist(s)

- Internal oblique

- Transversus abdominis

- Rectus abdominis

• Antagonist(s)

- Erector spinae

- Quadratus lumborum

• Function

Compresses abdomen; laterally flexes and rotates vertebral column