Rectus Abdominis Muscle
External Oblique Muscle
The external oblique muscle is one of the four main muscles in the abdominal wall.
Attachments of External Oblique Muscle: Origin & Insertion
Origin: (proximal attachments)
a. External surfaces of ribs 5-12.
Insertion: (distal attachments)
a. Anterior iliac crest and abdominal aponeurosis to linea alba.
Wish there was an easier way to learn? There is! Learn the anatomy of the external oblique muscle in half the time with this trunk wall muscle anatomy reference chart.
Actions of the abdomen:
a. Flexes vertebral column (draws thorax downward).
a. Rotates vertebral column (torso).
a. Laterally flexes vertebral column (compresses abdomen).
Innervation of External Oblique Muscle:
- 8-12 intercostal, iliohyogastric, and ilioinguinal nerves.
An Overview of the External Oblique Muscle
Muscles That Act On Abdominal Wall