Anatomy Practical 2 - Forearm pronators & supinators

NAU OTD - Movement 1

Pronator teres - Humeral head

Origin: Medial epicondyle of humerus

Insertion: Lateral surface of middle radius

Innervation: Median (C6-C7)

Action: Pronation

Pronator teres - Ulnar head

Origin: Coronoid process of ulna

Insertion: Lateral surface of middle radius

Innervation: Median (C6-C7)

Action: Pronation

Pronator Quadratus

Origin: Distal fourth of anterior ulna

Insertion: Distal fourth of anterior radius

Innervation: Anterior interosseous branch of median (C8-T1)

Action: Pronation

Supinator

Origin: Lateral epicondyle; radial collateral and annular ligaments; supinator crest and fossa of ulna

Insertion: Proximal third of radius (lateral, posterior, anterior surfaces)

Innervation: Deep branch of radial (C6-C7)

Action: Supination

Biceps brachii - Long lead

Origin: supraglenoid tubercle of scapula

Insertion: Radial tuberosity; bicipital aponeurosis

Innervation: Musculocutaneous (C5-C6)

Action: Elbow flexion & assists in forearm supination

Biceps brachii - Short head

Origin: Coracoid process of scapula

Insertion: Radial tuberosity; bicipital aponeurosis

Innervation: Musculocutaneous (C5-C6)

Action: Elbow flexion & assists in forearm supination