Elbow & Radioulnar Joints

What are the articular surfaces with the elbow joint

Trochlea of humerus with trochlea notch of ulna
Capitulum of humerus with radial head
Radial head with radial notch of ulna

Name the ligaments of the elbow joint

Lateral collateral lig
Annular lig
Medial collateral lig

What is the carrying angle

Made by the axes of the arm & forearm when the elbow is fully extended

Where does the elbow joint capsule attach proximally
Ant:
Post:

Humerus above coronoid fossa and radial fossa.
Humerus above the olecranon fossa.

Where does the elbow joint capsule attach distally
Medially:
Laterally:

Ant/Post:

Medial margin of the coronoid process.
Blends with annular lig

Ulna along the edges of the coronoid and olecranon processes

Describe the synovial membrane of the joint capsule of the elbow

Lines the fibrous capsule and is continous with the proximal radio-ulnar joint.

What are the 2 clinically significant groups of bursae

3 olecranon bursa & Bicepitoradial bursa

Attachments of Radial collateral lig

From lateral epicondyle to annular lig

Attachments of the annular lig

Around the head of the radius. Ataching to lips of radial notch.

Attachments of ulnar collateral lig

Triangular in 3 bands from medial epicondyle to coronoid, around to the olecranon process.

Neurological supply of the elbow joint

Musculocutaneous, radial & ulnar nerves

Articular surfaces of the proximal Radio-Ulnar Joints

Head of radius with the radial notch

What are the movements of the proximal radio-ulnar

Pronation & supination. Radius rotates around the ulna.

Describe the capsule of the proximal radio-ulnar joint

Both fibrous & synovial layers continous with the one of the elbow.

Articulatory surfaces of distal radio-ulnar

Head of ulna with the ulnar notch on distal radius

Attachments of the fibrocartilaginous disc

Ulnar notch of the radius and the base of the ulnar styloid

What is the function of the fibrocartilaginous disc in the distal radioulnar joint

Acts as a stabilizer for the distal radioulnar joint & prevents direct contact between the ulna and the carpus.