OUTLINE

ELBOW JOINT

 

I. Articulations

A. Humeroulnar

1. Bones

a. Humerus (Trochlea)

b. Ulna

B. Humeroradial

1. Bones

a. Humerus (Capitulum)

b. Radius

C. Proximal Radioulnar

1. Bones

a. Radius (Radial Head)

b. Ulna (Radial Notch)

 

II. Articular Capsule (shared by the three joints listed above)

A. Ligaments

1. Anterior (capsular)

2. Posterior (capsular)

3. Radial or Lateral Collateral

4. Ulnar or Medial Collateral

a. Anterior Bundle

b. Posterior Bundle

c. Oblique Bundle

5. Annular

III. Distal Radioulnar Articulation

A. Osseous Anatomy

1. Radius

2. Ulna (head)

B. Ligamentous Anatomy

1. Dorsal radioulnar (Posterior)

2. Volar radioulnar (Anterior)

C. Cartilage

1. Fibrocartilage disk between ulnar head & carpal bones (Lunate & Triquetrum)

 

IV. Related Structures

A. Interosseous membrane

V. Movements

A. Humeroulnar

1. Flexion/Extension

2. Carrying Angle

a. Males - 5°

b. Females - 10° to 15°

3. Active Range of Motion

a. 135° to 145°

4. Passive Range of Motion

a. 150° to 160°

 

 

B. Humeroradial, Proximal & Distal Radioulnar

1. Pronation/Supination

2. Total Range of Motion

a. 150° (± 75°)

V. Muscles

A. Biceps brachii

1. Short Head

2. Long Head

B. Brachialis

C. Brachioradialis

D. Triceps brachii

1. Long Head

2. Lateral Head

3. Medial Head

E. Anconeus

F. Pronator Teres

G. Pronator Quadratus

H. Supinator