Extensor Tendon Anatomy

The common extensor tendon is a tendon that attaches to the lateral epicondyle of the humerus. It contains two tendons the abductor pollicis longus abd l and the extensor pollicis brevis est b both of which originate deep in the ulnar side of the forearm from the dorsal aspects middle third of the ulna radius and interosseous membrane b.

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It is however commonly brought on by activities that require repetitive wrist flexion and extension.

Extensor tendon anatomy. Any movement of the thumb and wrist causes the patient pain inflammation and swelling. They can be injured by a minor cut or jamming a finger which may cause the thin tendons to rip from their attachment to bone. They lie next to the bone on the back of the hands and fingers and straighten the wrist fingers and thumb figure 1.

These particular tendons allow you to straighten your fingers and thumb and can be injured by a simple cut or jammed finger. Intersection syndrome can be caused by direct trauma to the second extensor compartment. And vilensky j all in one anatomy exam review.

Extensor pollicis brevis epb. Indications lacerations 50 of tendon in all zones if patient can extend digit against resistance. Extensor tendons are just under the skin.

Each tunnel is lined internally by a synovial sheath and separated from one another by a fibrous septa. Understanding of and familiarity with the extensor anatomy of the hand and ﬁngers by the radiologist is crucial for better assessment of pathologic conditions with mr imaging and optimization of this mo dality as a diagnostic tool. The muscles comprising the extrinsic extensor tendon complex are located in the dorsal aspect of the forearm and all are innervated by the radial nerve.

If not treated it may be hard to straighten one or more joints. Extensor tendons of the wrist. Extensor tendon compartments ligaments of the fingers flexor pulley system blood supply to hand wrist ligaments biomechanics.

Posterior view of muscles of the forearm showing common extensor tendon suarez ca. Extensor pollicis longus epl. Extensor tendon injuries and tenosynovitis represent clinical situations in which knowledge of this anatomy is use.

Indications acute 12 weeks zone 1 injury mallet finger nondisplaced bony mallet. Techniques full time splinting for six weeks. Extensor tendons are thin tendons located on the back of the hand just under the skin.

The extensor tendon compartments of the wrist are six tunnels which transmit the long extensor tendons of the forearmthey are located on the posterior aspect of the wrist. Extensor tendon compartments of the wrist. Chronic mallet finger 12 weeks if joint supple congruent.

Extensor Tendon Injuries