Elbow Joint Flashcards
Elbow Joint
Location: Btwn the distal end of the humerus and the proximal ends of the radius and ulna
Function: Synovial hinge joint, with the articular surfaces of the these bones covered with hyaline cartilage
The Articular Joint Capsule
Location: Extends from the margins of the trochlea and capitulum of the humerus to the semilunar (Trochlear) notch of the ulna at the edge of the articular cartilage.
Not attached t the radius
Function: Tends to be loose in oder to freely allow flexion and extension of the elbow joint,
Ulnar Collateral (Medial Collateral) ligament
Location: Siginifcanly thicker capsule along the medial edge of the joint Fiber of the ligmaent extend down from the medial epicondyle of the humerus to the proximal ulna, near the olecranon process.
Radial Collateral (Lateral Collateral) ligament
Location: Lateral surface of the elbow joint, thickens
Annular Ligament
Location: wraps around both the head and neck of the radius, it is attached only at the margins of the radial notch of the ulna
It isnot attached to the radius itself
Function:arrangment and the shape of this ciruclar ligament permits the radius to freely roate with the annular ligament in supination and pronation movements of the hand
The oblique cord
Location: Extending btwn the ulna and radius, attaching just belwo the radial tuberosity
Radial Tuberosity
FunctionL serves at the attachment point for the tendon of the bicepsbrachii muscle, a powerful flexor/ supinator of the forearm
Interosseous Membrane
Location: Runs obliquely from the interosseous border of the radius to the corresponding border of the ulna
Function:
Children elbow Joints
Ligaments of the elbow joint are somewhat weak, yet become progressively stronger until age 25 +
It is very easy to dislocate the elbow of a child or teenager, especially when the limb is pulled forcefully.
