Elbow joint
Type
Hinge joint
Articular surfaces
Upper
Capitulum and trochlea of humerus
Coronoid fossa
Coronoid process of ulna
Radial fossa
For radial head
Lower
Upper surface of head of radius articulates with capitulum
Trochlear notch of ulna
Articulates with trochlea of humerus
Cubital articulations
Superior radioulnar joint
Humeroradial joint
Humeroulnar joint
Ligaments
Capsular ligament
Superiorly
Attached to lower end of humerus
Intracapsular structures are
Capitulum , trochlea , radial fossa , coronoid fossa , olecranon fossa
Inferomedially
Attached to margin of trochlear notch of ulna except laterally
Inferolaterally
Attached to annular ligament of superior radioulnar joint
Thickenings of capsule
Anterior ligament
Posterior ligament
Ulnar collateral ligament
Triangular in shape
Attached
Apex to medial epicondyle of humerus
Base to ulna
Bands
Thick anterior and posterior bands
Attached Below to coronoid process and olecranon process
Lower ends joined together by
Oblique band
Radial collateral or lateral ligament
Fan shaped band extending from
Lateral epicondyle to annular ligament
Gives origin to
Supinator , extensor carpi radialis brevis
Relations
Anteriorly
Brachialis , median nerve , brachial artery , tendon of biceps brachii
Posteriorly
Triceps brachii , anconeus
Medially
Ulnar nerve , flexor carpi ulnaris , common flexors
Laterally
Supinator , extensor carpi radialis brevis
Blood supply
Anastomosis around elbow joint
Nerve supply
Ulnar , median , radial , musculocutaneous
Movements
Flexion
Brachialis , biceps brachi , brachiradialis
Extension
Triceps , anconeus
Carrying angle
Transverse axis of elbow joint
Directed medially and dowards
Extended forearm is not in straight line
13 degree angle