Transversus Abdominis

Muscle Origin

Iliac crest/lumbar vert./costal cartilages of ribs 5-10 to the xiphoid process, linea alba and pubis.

Iliac crest, inguinal ligament, thoracolumbar fascia, and costal cartilages 7-12.

Insertion

Xiphoid process, linea alba, pubic crest and pecten pubis via conjoint tendon.

Aponeurosis of posterior and anterior rectus sheath and conjoint tendon to pubic crest and pectineal line. LUMENanatomy-model-muscles-033-edited 4

Action

Compresses abdomen.

Compresses abdominal contents, supports abdominal wall, aids forced expiration and raising intra-abdominal pressure. Conjoint tendon supports posterior wall of inguinal canal. LUMEN

Innervation – Nerve control

Thoracoabdominal nn. (T6-T11), Subcostal n. (T12), iliohypogastric nerve (L1), and ilioinguinal nerve (L1).

The transverse abdominal is innervated by the lower intercostal nerves (thoracoabdominal, nerve roots T7-T11), as well as the iliohypogastric nerve and the ilioinguinal nerve. Wiki

Artery

Subcostal arteries.

The subcostal arteries, so named because they lie below the last ribs, constitute the lowest pair of branches derived from the thoracic aorta, and are in series with the intercostal arteries. Wiki

Antagonist muscles

 

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

 

Additional Resources
Wiki
LUMEN

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