In jersey finger, which tendon is detached?

In the case of jersey finger, the tendon that is typically detached is the flexor digitorum profundus. This injury often occurs when a person grabs a jersey or another object while the finger is flexed, resulting in an avulsion of the tendon from the distal phalanx. This leads to an inability to flex the affected distal phalanx, which is a hallmark of jersey finger.

The flexor digitorum profundus is responsible for flexing the distal interphalangeal joint of the fingers, and when it is injured, complete flexion at that joint cannot occur, resulting in a characteristic deformity. This injury commonly affects the ring finger and can pose significant challenges for hand function if not treated properly.

Understanding the mechanics of jersey finger is essential in emergency medicine as prompt diagnosis and treatment are critical to preventing lasting impairment. Recognizing that the flexor digitorum profundus tendon is the one involved helps in both immediate management and further orthopedic evaluation.