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