Oblique cord
Oblique cord
The oblique cord is a small, yet significant ligament located in the forearm. It is a fibrous band that extends between the ulna and the radius, the two long bones of the forearm. The oblique cord plays a crucial role in the stability and function of the forearm, particularly in the movements of pronation and supination.
Anatomy
The oblique cord originates from the lateral side of the ulnar tuberosity, which is a bony prominence on the upper part of the ulna. It then extends obliquely downward and laterally to insert into the radius, just below the radial tuberosity. The exact length and thickness of the oblique cord can vary among individuals.
Function
The primary function of the oblique cord is to stabilize the proximal radioulnar joint, which is the joint between the upper ends of the radius and ulna. It helps to limit the separation of these two bones during movements of the forearm. Additionally, the oblique cord assists in the transmission of forces from the radius to the ulna, particularly during activities that involve pushing or pulling.
Clinical Significance
Injuries or abnormalities of the oblique cord can affect the stability and function of the forearm. Conditions such as forearm fractures, dislocations, or ligamentous injuries can involve the oblique cord and may require medical intervention. Understanding the anatomy and function of the oblique cord is important for healthcare professionals in diagnosing and treating such conditions.
Related Structures
The oblique cord is part of a complex network of ligaments and muscles that contribute to the stability and movement of the forearm. Other important structures in this region include the interosseous membrane, the annular ligament, and the distal radioulnar joint.
See Also
- Ulna
- Radius
- Proximal radioulnar joint
- Interosseous membrane
- Annular ligament
- Distal radioulnar joint
References
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