Annular ligaments of the carpus are strong fibrous bands that encircle the wrist joint, connecting the carpal bones in the hand. They are crucial in stabilizing the carpal bones and allowing smooth movement of the hand, preventing dislocation and providing support during gripping activities.
The carpus is a complex structure composed of eight small bones that make up the wrist joint. The annular ligaments form a series of concentric rings or loops that fit around the carpal bones, forming a flexible joint capsule that holds the bones tightly together. These ligaments are located on the dorsal (back) and palmar (palm) aspects of the wrist joint.
The annular ligament on the dorsal side, also known as the extensor retinaculum, functions to hold the extensor tendons in place, preventing them from bowstringing during wrist movement. On the palmar side, the annular ligament, called the flexor retinaculum or transverse carpal ligament, forms the roof of the carpal tunnel, protecting the underlying tendons and the median nerve.
Injury or damage to the annular ligaments of the carpus can result in wrist instability, reduced grip strength, pain, and limited hand movement. Conditions such as carpal tunnel syndrome or ligament tears can affect the proper functioning of these ligaments. Treatment options may include rest, immobilization, physical therapy, or in severe cases, surgical intervention to repair or reconstruct the damaged ligaments.
Overall, the annular ligaments of the carpus play a crucial role in maintaining the stability and functionality of the wrist joint, allowing for smooth and coordinated movement of the hand and fingers.
