Arm Muscles

Coracobrachialis origin

Coracoid process

Coracobrachialis insertion

Mid shaft of humerus

Coracobrachialis action

Flex shoulder, adduct arm

Coracobrachialis innervation

Musculocutaneous n.

Coracobrachialis blood supply

Brachial, anterior humeral circumflex a.

Biceps brachii origin

Supraglenoid tubercle (long), Coracoid process (short)

biceps brachii insertion

Radial tuberosity

Biceps brachii action

Elbow flexion when supine, forearm supination

Biceps brachii innervation

Musculocutaneous n.

Biceps brachii blood supply

Brachial a.

Brachialis origin

Distal anterior humerus

Brachialis insertion

Coronoid process or ulna

Brachialis action

Elbow flexion (prone or supine)

Brachialis innervation

Musculocutaneous n.

Brachialis blood supply

Brachial a.

Triceps brachii long head origin

Infraglenoid tubercle

Triceps brachii long head insertion

Olecranon process of ulna

Triceps brachii long head action

Elbow, shoulder extension

Triceps brachii long head innervation

Radial n.

Triceps brachii long head blood supply

Deep brachial a.

triceps brachii lateral head origin

Posterior humeral shaft (superior to radial groove)

triceps brachii lateral head insertion

Olecranon process of ulna

triceps brachii lateral head action

Elbow extension

triceps brachii lateral head innervation

Radial n.

triceps brachii lateral head blood supply

Deep brachial a.

Triceps brachii medial head origin

Posterior humeral shaft (inferior to radial groove)

Triceps brachii medial head insertion

Olecranon process of ulna

Triceps brachii medial head action

Elbow extension

Triceps brachii medial head innervation

Radial n.

Triceps brachii medial head blood supply

Deep brachial a.

Anconeus origin

Lateral epicondyle of humerus

Anconeous insertion

Olecranon process of ulna

Anconeous action

Elbow extension

Anconeous innervation

Radial n.

Anconeous blood supply

Posterior interosseous a.