External Oblique
Abdomen & Core
Its fibers run like putting your hands in your pockets — that's the direction of pull.
Function
Rotates trunk contralaterally, flexes trunk, compresses abdomen
Origin
External surfaces of ribs 5-12
Insertion
Linea alba, pubic tubercle, anterior iliac crest
Innervation
Intercostal nerves T7-T12, subcostal nerve, iliohypogastric nerve