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ELBOW JOINT
- 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
| Type | Hinge joint |
| Bones | Humerus, radius, ulna |
| Mnemonics | CRAzy TULips (Capitulum = RAdius, Trochlea = ULna) |
| Ligaments | Ulnar collateral ligament, radial collateral ligament, annular ligament, quadrate ligament |
| Blood supply | Proximal to elbow joint - Ulnar collateral artery, radial collateral artery, middle collateral artery |
| Distal to elbow joint - Radial recurrent artery, ulnar recurret artery | |
| Movements | Flexion - Biceps brachii, Brachialis, Brachioradialis muscles |
| Mnemonic: 3 B's bend the elbow | |
| Extension - Triceps brachii muscle | |
| Clinical | Fractures, epicondylitis, arthritis, venipunctures |
Discussion