muscles of the arm

brachialis: origin & insertion

anterior surface of the distal humerus; coronoid process of ulna

coracobrachialis: origin & insertion

coracoid process; mid shaft of humerus (usually kind of torn up in donors)

triceps brachii: action

extends shoulder, extends elbow

brachialis: action

flexes elbow

coracobrachialis: action

flexes shoulder

biceps brachii: action

flexes shoulder, flexes elbow, supinates forearm

triceps brachii: origin

long head: infraglenoid tubercle; lateral head: posterior shaft of humerus; medial head: posterior shaft of humerus

biceps brachii: nerve supply

musculocutaneous

brachialis: nerve supply

musculocutaneous

coracobrachialis: nerve supply

musculocutaneous

triceps brachii: insertion

olecranon process

triceps brachii: nerve supply

radial

biceps brachii: insertion

radial tuberosity

biceps brachii: origin

short head: coracoid process; long head: supraglenoid tubercle of scapula