External Abdominal Oblique

Muscle Origin

Ribs 5-12 to iliac crest and linea alba.anatomy-model-muscles-arm-032 -edited 3

Anterior fibers: external surfaces of ribs 5 to 8, interdigitating with serratus anterior. Lateral fibers: external surfaces of 9th rib, interdigitating serratus anterior, and those ribs 10 to 12, interdigitating with latissimus dorsi.


Iliac crest, Pubic tubercle, Linea alba.

Anterior Fibers: into a broad flat aponeurosis, terminating at the linea alba.
Lateral fibers: into the anterior iliac spine and pubic tubercle, and into the external lip of the anterior half of the iliac crest.


Flexes vertebral column. Contralateral rotation of torso.

Aids the rectus abdominis muscle in compressing the abdominal wall and supporting the viscera, flexes the vertebral column and forced exhalation. American Academy of Manual Medicine

Innervation – Nerve control

Thoracic nerves (T7, T8, T9, T10, T11, T12) and Lumbar nerves (L1, L2).

The thoracic nerves are a cluster of nerve fibers found in the upper body, particularly within the chest region.


Superior and inferior epigastric arteries.

The superior epigastric artery supplies the peripheral portion of the anterior diaphragm and the superficial muscles of the anterior abdominal wall. The inferior epigastric artery is the artery that comes out from the external iliac artery and is connected with the superior epigastric artery.

Antagonist muscles


Pictures of muscles


Trigger Point Referrals


Stretching description








Additional Resources

Chandler Physical Therapy © 2014 Frontier Theme