The hand surgeon then examines the hand to determine its vascular status and neurological status. Abnormal posture of the finger or wrist at rest.An inability to extend one or more joints of your finger or wrist.An open injury, such as a cut, on the dorsal side of your hand,.The most common signs of a extensor tendon injury include: These types of tears can be difficult to diagnose. With a partial tendon tear, it may still be possible to extend your finger, but not completely. Occasionally, extensor tendons may be partially cut or torn. If a tendon is torn or cut, the ends of the tendon will pull far apart, making it impossible for the tendon to heal on its own. Like a rubber band, tendons are under tension as they connect the muscle to the bone. In these cases, the tendon is often cut into two pieces. Because extensor tendons are close to the surface of the skin, a deep cut will most likely hit an extensor tendon. The six dorsal compartments of the wrist containing their extensor tendons.Ī torn or cut tendon in the forearm, at the wrist, in the palm, or along the finger will make it impossible to extend one or more joints of the finger or wrist. The sheaths do not improve mechanical efficiency greatly on the dorsum of the hand but are useful for hand surgeons in nomenclature (naming). On the bottom of the hand this system of pulleys improves mechanical efficiency. When you bend or straighten your finger, the extensor tendons slide through snug tunnels, called tendon sheaths, that keep the tendons in place next to the bones. These structures are known as the extensor tendons (diagram below).Įxtensor tendons allow the finger and thumb joints to straighten-laceration of the tendons of the ring finger produces the image below (ring finger): The tendons on the dorsal (top) side extend the fingers and wrist. Long tendons extend from these muscles through the wrist and attach to the small bones of the fingers and thumb. The muscles that move the fingers and thumb are in the forearm. This causes parts of the body (such as a finger) to move. When muscles contract, tendons pull on bones. Tendons are tissues that connect muscles to bone. Certain conditions that weaken tendons (such as rheumatoid arthritis) can also be associated with spontaneous extensor tendon rupture. An extensor tendon injury can make it impossible to extend your fingers or thumb. The inability to perform these functions can severely limit hand and upper extremity function.Ī deep cut, overstretching or blunt trauma on the dorsal (top) side of your fingers, hand, wrist, or forearm can damage your extensor tendons, (often called by laymen “leaders”) which are the tissues that help control movement in your hand. It can make it hard for you to extend your wrist, open your hand, or straighten your fingers. A Patient’s Guide to Extensor Tendon Injuries IntroductionĪn extensor tendon injury is damage to the tissues on the back of the hand and fingers.
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