Extensor Tendon Injuries
Extensor tendons, located on the back of the hand and fingers, allow you to straighten your fingers and thumb (see Figure 1). These tendons are attached to muscles in the forearm. As the tendons continue into the fingers, they become flat and thin. In the fingers, smaller tendons from small muscles in the hand join these tendons. It is these small-muscle tendons that allow delicate finger motions and coordination.