Elbow Joint and Radio-ulnar Joint Flashcards
What type of joint is the elbow joint?
A synovial hinge
What movements occur at the elbow joint?
Extension and flexion
Where is the fibrous layer of the elbow joint capsule thickened and why?
Thickened on the medial and lateral aspects of the joints to form the strong bands of the medial and lateral collateral ligaments
Where is the fibrous layer of the elbow joint capsule looser and why?
The capsule is loose on both the anterior and posterior aspects of the joint to allow for movement
Identify the structures labelled 1-3
1- Ulnar collateral ligament
2- Radial collateral ligament
3- Anular ligament
Which ligament of the elbow holds the head of the radius?
The anular ligament
What are the flexors of the elbow joint?
Biceps brachii
Brachialis
Brachioradialis
What are the extensors of the elbow joint?
Triceps
Anconeus
What type of joints are each of the radio-ulnar joints?
Both proximal and distal are pivot typr synovial joints
What are the movements of the radio-ulnar joint?
Supination and pronation
What are the main muscles of supination?
Supinator (without resistance)
Biceps (with resistance)
What are the main muscles of pronation?
Pronator quadratus
Pronator teres
What other muscles assist during supination?
Extensor pollicus longus
Extensor carpi radialis longus
Which other muscles assist during pronation?
Flexor carpi radialis
Palmaris longus
Brachioradialis
Which muscle is the most powerful supinator of the forearm?
Biceps brachii
