Elbow OIAs

Biceps Brachii Origin

Biceps Brachii Origin

Short head - coracoid process

Long Head - supraglenoid tubercle of scapula

Biceps Brachii Insertion

Radial tuberosity

Biceps brachii aponeurosis

Biceps Brachii Action

Shoulder - flexion

Elbow - flexion, forearm supination

Brachialis Origin

Distal 2/3 anterior humerus

Brachialis Insertion

Ulna tuberosity

Coronoid process

Brachialis Action

Elbow flexion

Brachioradialis Origin

Upper 2/3 of lateral humeral supracondylar ridge

Brachioradialis Insertion

Lateral radius just proximal to base of styloid process

Brachioradialis Action

Elbow flexion

Supination to midposition

Pronation to midposition

Triceps Brachii Origin

Long head - infraglenoid tubercle

Lateral head - lateral and posterior surface of proximal ½ of body of humerus

Medial head - distal 2/3 of medial and posterior surfaces of humerus below radial groove

Triceps Brachii Insertion

Posterior surface of olecranon process

Triceps Brachii Action

Shoulder - long head - ext and add

Elbow - extension

Pronator Teres Origin

Medial humeral epicondyle

Coronoid process

Pronator Teres Insertion

Lateral radius near its center

Pronator Teres Action

Forearm pronation

Elbow flexion

Pronator Quadratus Origin

Distal ¼ anterior ulna

Pronator Quadratus Insertion

Distal ¼ anterior radius

Pronator Quadratus Action

Forearm pronation

Supinator Origin

Lateral humeral epicondyle

LCL

Annular ligament

Supinator Insertion

Lateral upper 2/3 of radius

Supinator Action

Forearm supination