Elbow Joint Kinesiology

Elbow Joint Humeroulnar Joint Humeroradial Joint True hinge joint Restricted ball and socket joint

Parts of the Humerus Trochlea Capitulum Medial and Lateral Epicondyle medial side spool like process Capitulum lateral side spherical knob Medial and Lateral Epicondyle

Lateral Epicondyle C. Medial epicondyle E. Capitulum D. Trochlea

Parts of the Radius Radial notch directly beneath the capitulum of the humerus Unable to abduct and adduct because of the annular ligament that encircles the radial head and binds it to the radial notch of the ulna

Proximal and Distal Radioulnar Joints Movement – Pronation and Supination

Proximal Radioulnar Joint The two joints of the elbow as well as the proximal radioulnar joint is completely enveloped in a single extensive capsule The capsule is strengthened by four ligaments anterior, posterior, radial collateral, and ulnar collateral.

Radial collateral ligament

Movements of the Elbow Flexion and Extension

Muscles of the Elbow and Radioulnar Joints

FLEXORS Biceps brachii Brachialis Brachioradialis Pronator teres

EXTENSORS Tricpes brachii Anconeus

SUPINATORS Biceps brachii Supinator

PRONATORS Pronator teres Pronator quadratus