ERECTOR SPINAE

• Origin

Spine

• Insertion

Ribs, pelvis

• Agonist(s)

- Gluteus maximus

(Hamstrings)

- Biceps Femoris

- Semitendinosus

- Semimembranosus

• Antagonist(s)

- Rectus abdominis

- Quadratus lumborum

• Function

Supports spine, extends back