Arthrology, Ligaments & Bursa of the Elbow Flashcards
What are the 3 articulations within the same joint capsule of the elbow joint?
1) Humeroulnar Joint
2) Humeroradial Joint
3) Proximal Radioulnar Joint
Anteriorly, the trochlea of the humerus articulates with the trochlear notch of the ulna. Posteriorly, the olecranon articulates with the olecranon fossa in full extension.
Humeroulnar Joint
The capitulum articulates with the superior surface of the head of the radius that is slightly cup-shaped.
Humeroradial Joint
What type of joint is the elbow joint?
Synovial Hinge Joint
What 2 movements are available at the elbow joint?
1) Flexion
2) Extension
The head of the radius articulates with the radial notch of the ulna.
Proximal Radioulnar Joint
What type of joint is the proximal radioulnar joint?
Synovial Pivot Joint
What 2 movements does the proximal radioulnar joint allow?
1) Pronation
2) Supination
Rotation of the forearm where the palm faces down.
Pronation
Rotation of the forearm where the palm faces up.
Supination
What are the 3 ligaments of the elbow?
1) Lateral (Radial) Collateral Ligament
2) Medial (Ulnar) Collateral Ligament
3) Annular Ligament
A ligament that runs from the lateral epicondyle of the humerus to the annular ligament of the radius. It prevents cubitus _____ deviation.
Lateral (Radial) Collateral Ligament
Varus
A ligament that runs from the medial epicondyle of the humerus to the coronoid and olecranon processes. It prevents cubitus ______ deviation.
Medial (Ulnar) Collateral Ligament
Valgus
A bursa located between the olecranon and overlying skin.
Olecranon Bursa
What is the layman’s term for olecranon bursitis?
Student’s Elbow
A U-shaped ligament that runs from the anterior surface of the radial notch around the head of the radius to the posterior surface of the radial notch to hold the head of the radius in place.
Annular Ligament
When the head of the radius gets pulled distally out of the annular ligament due to forceful traction of a pronated forearm. Common for preschool kids.
Slipped Elbow
The head of the ulna articulates with the ulnar notch of the radius.
Distal Radioulnar Joint
What type of joint is the distal radioulnar joint?
Synovial Pivot Joint
What 2 movements does the distal radioulnar joint allow?
1) Pronation
2) Supination
There is an _________ ____ that binds the distal radius and ulna together. The ____ does not directly articulate with the carpal bones because of it.
Articular Disc
Ulna
These ligaments run from the distal ulna and distal radius on both the palmar and dorsal surfaces.
Palmar & Dorsal Radioulnar Ligaments
A thick, dense fibrous sheet of connective tissue between the radius and ulna that helps to stabilize the 2 bones, as well as the proximal and distal radioulnar joints.
Interosseous Membrane
