Muscles of the Pectoral Girdle

Muscles acting on the pectoral girdle: pectoralis minor, serratus anterior, levator scapulae, trapezius, rhomboideus minor, rhomboideus major

pectoralis minor origin: ribs 3-5

serratus anterior origin: ribs 1-8

levator scapulae origin: transverse process of C1-C4

rhomboideus major and minor: spinous processes C7 and T1-T5

pectoralis minor insertion: coracoid process of scapula

serratus anterior insertion: vertebral border of scapula

levator scapulae insertion: medial border of scapula superior to spine

rhomboideus major and minor: medial border of scapula

pectoralis minor function: draws scapula forward and down

serratus anterior function: rotates scapular laterally and upward (punching and planks)

levator scapulae function: elevates/adducts scapula

trapezius function: rotates, raises and retracts scapula

rhomboideus major and minor: stabilize scapula, retract (adduct) scapula (squaring the shoulders)