In human anatomy, the extensor pollicis longus muscle (EPL) is a skeletal muscle located dorsally on the forearm.It is much larger than the extensor pollicis brevis, the origin of which it partly covers and acts to stretch the thumb together with this muscle.Actions: extension of the thumb (metacarpophalangeal . The long extensor tendon to the thumb is called the Extensor Pollicis Longus (EPL). This tendon straightens the end joint of the thumb and also helps pull the thumb in towards the index finger. The tendon runs around a bony prominence on the back of the wrist called Lister’s tubercle.
Common Extensor Tendon Injuries. Mallet Finger refers to a drooping end-joint of a finger. This happens when an extensor tendon has been cut or torn from the bone (Figure 2). It is common when a ball or other object strikes the tip of the finger or thumb and forcibly bends it. Extensor tendon lacerations typically receive less attention than their flexor tendon counterparts, even though their incidence is higher and anatomy more complex, with management being more varied depending on the anatomical zone of injury. There is also a misconception that repairing extensor tendons is comparatively easier.
Zones of Extensor Tendon Injuries: Zone I • Disruption of terminal extensor tendon distal to or at the DIP joint of the fingers and IP joint of the thumb (EPL) • Mallet Finger: Zone II • Disruption of tendon over middle phalanx or proximal phalanx of thumb (EPL) Zone III3.4/5. 5 mm tendon excursion Thumb EPL 60 block and radial abduction Dorsal outrigger dynamic portion for exercise. 2) Educate patient regarding tendon precautions, surgical procedure, full time splint wear, and treatment rationale. 3) Instruct patient in home exercise program. A) .
Lacerations of the thumb extensor tendon are quite common and, usually, quite painful. If more than 50 percent of the tendon has been lacerated it will likely require surgical correction, but those with less serious lacerations often try to heal naturally. S66.2 Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level. S66.20 Unspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level. S66.201 Unspecified injury of extensor muscle, fascia and tendon of right thumb at wrist and hand level.