muscles of pectoral girdle

(C) trapezius (superior, middle, inferior fibers) origin

thoracic and cervical vertebrae; occipital bone

(C) trapezius (superior, middle, inferior fibers) insertion

spine of scapula; clavicle

(H) superior fibers of trapezius action

elevate and rotate scapula

(H) middle fibers of trapezius action

retract scapula

(H) inferior fibers of trapezius action

depress scapula

(C*) rhomboideus origin

(H) rhomboid major origin

(H) rhomboid minor origin

cervical and thoracic vertebrae

(C*) rhomboideus insertion

(H) rhomboid major insertion

(H) rhomboid minor insertion

medial border of scapula

(C*) rhomboideus action

(H) rhomboid major action

(H) rhomboid minor action

retract scapula

(H, C, rotator cuff muscle) supraspinatus origin

supraspinous fossa of scapula

(H, C, rotator cuff muscle) supraspinatus insertion

greater tubercle of humerus

(H, C, rotator cuff muscle) supraspinatus action

stabilize humerus

(H, C, rotator cuff muscle) infraspinatus origin

infraspinous fossa of scapula

(H, C, rotator cuff muscle) infraspinatus insertion

greater tubercle of humerus

(H, C, rotator cuff muscle) infraspinatus action

stabilize humerus

(H, C, rotator cuff muscle) subscapularis origin

subscapular fossa of scapula

(H, C, rotator cuff muscle) subscapularis insertion

lesser tubercle of humerus

(H, C, rotator cuff muscle) subscapularis action

stabilizes humerus; rotate shoulder medially

(H, rotator cuff muscle) teres minor origin

lateral border of scapula

(H, rotator cuff muscle) teres minor insertion

greater tubercle of humerus

(H, rotator cuff muscle) teres minor action

stabilizes humerus; rotate shoulder laterally

(H, C, rotator cuff muscle) teres major origin

scapula

(H, C, rotator cuff muscle) teres major insertion

lesser tubercle of humerus

(H, C*) pectoralis major origin

sternum; upper costal cartilages

(H, C*) pectoralis major insertion

intertubercular groove of humerus

(H, C*) pectoralis major action

flex shoulder; adduct shoulder

(H, C*) pectoralis minor origin

ribs 3, 4, and 5

(H, C*) pectoralis minor insertion

coracoid process of scapula

(H, C*) pectoralis minor action

protract scapula; depress scapula

(H, C) serratus anterior origin

ribs 1-8

(H, C) serratus anterior insertion

medial border of scapula

(H, C) serratus anterior action

protract scapula

(H, C) latissimus dorsi origin

thoracic and lumbar vertebrae

(H, C) latissimus dorsi insertion

intertubercular groove of humerus

(H, C) latissimus dorsi action

extends shoulder (primary mover)

(C*) deltoid origin

clavicle; spine of scapula

(C*) deltoid insertion

deltoid tuberosity of humerus

(H) anterior fibers of deltoid action

flex and medially rotate shoulder

(H) middle fibers of deltoid action

shoulder abduction

(H) posterior fibers of deltoid action

extend and laterally rotate shoulder