Pectoral girdle and arm

Trapezius

Actions (4): retracts, elevates, depresses scapulae; extends head

Rhomboids

Actions (2): retract and stabilize scapula

Pectoralis Minor

Origin: ribs

Insertion: coracoid process

Actions (2): depresses scapula and elevates ribs

Teres Minor

Action: laterally rotates arm

Teres Major

Actions (2): extends and medially rotates arm

Latissimus Dorsi

Origin: vertebral column

Insertion: humerus

Actions (3): Adducts, extends, and medially rotates arm

Deltoid

Origin: clavicle and scapula

Insertion: deltoid tuberosity

Actions (3): abducts, flexes, and extends arm

Pectoralis Major

Origin: clavicle and sternum

Insertion: humerus

Actions (2): adducts and flexes arm

Biceps Brachii

Insertion: radial tuberosity

Actions (2): flexes and supinates forearm

Triceps Brachii

Insertion: olecranon process of ulna

Action: extends forearm

Supinator

Origin: lateral epicondyle of humerus

Insertion: radius

Action: supinates forearm

Pronator teres

Origin: medial epicondyle of humerus

Insertion: radius

Action: pronates forearm