Anatomy Upper arm medial surface

Brachialis — origin?

Anterior surface of the distal half of the humerus

Brachialis — insertion?

Coronoid process and tuberosity of the ulna

Brachialis — action?

Flexion of the elbow

Biceps brachii — origin?

Long head- Superior margin of the glenoid cavity of the scapula Short head - Coracoid process of the scapula

Biceps brachii — insertion?

Tuberosity of the radius

Biceps brachii — action?

Flexion of the elbow

Triceps brachii — origin?

Long head - Inferior margin of the glenoid cavity of the scapula Lateral head - Posterior surface of the proximal end of the humerus Medial head - Posterior surface of the entire humeral shaft

Triceps brachii — insertion?

Olecranon process of the ulna

Triceps brachii — action?

Extension of the elbow

Anconeus — origin?

Lateral epicondyle of the humerus

Anconeus — insertion?

Olecranon process of the ulna

Anconeus — action?

Extension of the elbow

Brachioradialis — origin?

Lateral supracondylar ridge of the humerus

Brachioradialis — insertion?

Lateral surface of the radius, near the styoloid process

Brachioradialis — action?

Flexion of the elbow