INTERNAL OBLIQUES

• Origin

Thoracolumbar fascia, iliac crest, and inguinal ligament

• Insertion

Linea alba, pubic crest, and inferior ribs

• Agonist(s)

- External oblique

- Transversus abdominis

- Rectus abdominis

•  Antagonist(s)

- Erector spinae

- Quadratus lumborum

• Function

Compresses abdomen; laterally flexes and rotates vertebral column