Extensor retinaculum of the hand

The extensor retinaculum of the hand is a fibrous band located on the dorsal aspect of the wrist. It plays a crucial role in stabilizing the extensor tendons of the hand as they pass from the forearm into the hand. This structure is essential for maintaining the proper function of the extensor tendons during hand movements.

Structure: The extensor retinaculum is a thick, strong band of connective tissue that covers the extensor tendons as they cross the wrist joint. It is divided into six compartments, each of which contains specific extensor tendons. These compartments help to keep the tendons in place and prevent them from bowstringing during finger and wrist movements.

Function: The main function of the extensor retinaculum is to hold the extensor tendons close to the wrist joint, allowing them to function efficiently during hand movements. It also helps to prevent the tendons from becoming displaced or subluxed during activities that involve wrist extension and finger movements.

Clinical Significance: Injuries to the extensor retinaculum can result in extensor tendon subluxation or dislocation, leading to pain, swelling, and decreased hand function. Common conditions associated with extensor retinaculum injuries include extensor tendonitis, tenosynovitis, and extensor tendon subluxation.

Treatment: Treatment for extensor retinaculum injuries typically involves rest, immobilization, physical therapy, and in severe cases, surgical repair. It is essential to seek medical attention if you experience persistent pain, swelling, or difficulty moving your hand or fingers.

For more information on hand anatomy and related topics, please visit the hand anatomy page.