Elbow Anatomy

Question 1

Joints at elbow

Answer 1

Humero-ulnar (Uniaxial Synovial Hinge) Joint – Humorous articulates with ulna.
Humeroradial Joint – Humerus articulates with radius.
Proximal Radio-ulnar (Uniaxial Synovial Pivot) Joint – radius articulates with ulna.

Question 2

Ligaments at the Humero-ulnar

Answer 2

1. Ulnar (medial) collateral - Medial epicondyle of humerus to coronoid process and olecranon of ulna, triangular ligament with anterior, posterior, and oblique bands.

Question 3

Ligaments at the Humeroradial Joint

Answer 3

1. Radial (lateral) collateral - Lateral epicondyle of humerus to radial notch of ulna and anular ligament.

Question 4

Ligaments at the Proximal Radio-ulnar

Answer 4

1. Anular ligament - Surrounds radial head and radial notch of ulna, Keeps radial head in radial notch; allows pronation and supination.