Elbow: joint and bones

Which bone rotates to produce pronation and supination?

radius rotates about the ulna

Humeroulnar joint: type

uniaxial hinge joint

Humeroular articulation: extension

olecranon process of ulna inserts into olecranon fossa of humerus

Humeroulnar articulation: flexion

coronoid process of ulna inserts into coronoid fossa of humerus

Humeroulnar articulation: all ROM

trochlea of humerus articulates with trochlear notch of ulna

Radiocapitellar joint: type

non axial diarthrodial (gliding)

Radiocapitellar joint: articulation

capitulum of humerus with radial head

Radioulnar joint: type

interosseous membrane

Elbow ligaments

radial collateral, annular, ulnar collateral

Radial collateral ligament: function

prevents varus forces

Ulnar collateral ligament: function

prevents valgus forces

Tommy John surgery

reconstruction of UCL with palmaris longus or hamstring tendon