Rectus Abdominis

Muscle Origin

Pubic crest and pubic symphysis to xiphoid process/costal cartilages. (Note: Tendinous Intersections (Inscriptions).

Crest of pubis. Medial to the pubic tubercle is the pubic crest, which extends from this process to the medial end of the bone.anatomy-model-muscles-arm-032-edited-3


Costal cartilage of ribs 5-7, xiphoid process of sternum

From the fifth to seventh costal cartilages, and the inferomedial costal margin and posterior aspect of the xiphoid process of the sternum.


Flexes vertebral column/compresses abdomen.
Flexion of the lumbar spine.

Flexion of the vertebral column, posteriorly tilts the pelvis, compresses abdominal contents, assists with forcing expiration.

Innervation – Nerve control

Thoracoabdominal nerves

The muscles are innervated by thoracoabdominal nerves, which pierce the anterior layer of the rectus sheath. Wiki


Inferior epigastric artery.

The inferior epigastric artery is the artery that arises from the external iliac artery and anastomoses with the superior epigastric artery.

Antagonist muscles

Erector spinae.

The erector spinae is not just one muscle, but a bundle of muscles and tendons. The erector spinae or spinal erectors straighten and rotate the back. Wiki

Pictures of muscles


Trigger Point Referrals


Stretching description








Additional Resources

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