Elbow joint Flashcards
Name the joints in the complex elbow joint
- The humeroradial joint
- The humeroulnar joint
- The radioulnar joint
Which sturctures stabilize the elbow joint?
Bones and ligaments. Bony stability is provided by the trochlea of the humerus and the trochlear nothc on the ulna. Annular ligament of the radius and the collateral ligaments provide the ligamentous stability.
What structures are used to strenghten the elbow joint capsule?
The tendons of m. biceps brachii, and m. triceps brachii. They are called articular muscles that radiate into the capsule.
Where are the humeral epicondyles located in relation to the joint capsule?
They’re sitting laterally and medially of the capsulle, therefore they’re not wrapped in it
Where is the fatty tissue of the joint located and what’s it’s purpose?
It’s located between the synovial and fibrous membrane of the capsule. It’s main purpose is to limit the extreme movements of the joint.
Which structure of the capsule makes the rotation of the radium possible?
It’s the superior sacciform recess.
Explain the attachmens/paths of the ulnar colateral ligament.
It originates form the medial epicondyle and creates 2 strong bundles. The anterior bundle attaches itself to the coronoid process, whereas the posterior one attaches itself to the olecranon (lateral margin).
What can be found between the 2 branches of the ulnar colateral ligament?
Loose connective tissue can be found here, which is limited and secured by oblique fibers on the ulnar side.
Explain the attachmens/paths of the radial colateral lig.
Starts from the lateral epicondyle and continues to the annular ligament of the radius, then radiates into the ulna.
For which movement is the anular ligamen of the radius rly important?
It’s rly important for the supination/pronation. The cartilaginous tissue on it’s inner surface acts as a moveable buttress.
What are the possible movements of the elbow joint?
Flexion, extension, supination and pronation.
