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Extensor Tendons Hand Anatomy

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On the back of the hand the tendons to the middle ring and little fingers are connected by two obliquely placed bands one from the third tendon passing downward and lateralward to the second tendon and the other passing from the same tendon downward and medialward to the fourth. 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.

Extensor Tendonitis Causes Recovery And Prevention

As the tendons generally rupture in an ulnar to radial direction the condition is also frequently referred to as caput ulnae syndrome.

Extensor tendons hand anatomy. They lie next to the bone on the back of the hands and fingers and straighten the wrist fingers and thumb figure 1. Rheumatoid arthritis ra is the most common underlying etiology of tendon rupture in the hand and wrist. Extensor tendon lacerations are more common than flexor tendon lacerations with one study of 124 tendon lacerations finding that 613 involved the extensor tendons.

Extensor tendons are just under the skin. The epb tendon is in the forearm and then runs along the radial side of the wrist. Creates 4mm of tendon excursion and prevents adhesions.

The only area in which incidence rates were similar was the fingers which may be explained by the more superficial location and lack of protection of the extensor tendons on the dorsum of the hand. Each tunnel is lined internally by a synovial sheath and separated from one another by fibrous septa. Extensor tendons of the fingers.

The extensor pollicis brevis tendon along with the apl also takes the thumb away from the hand. Increased early active range of motion. After zone 4 7 extensor tendon repair.

Relative motion splint yoke splint positions the involved mcp joint in hyperextension relative to adjacent digits. The extensor tendons are held in place by the extensor retinaculum. This tendon also travels in the first compartment of the band that holds the tendons in position at the wrist.

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. Extensor tendon compartments of the wrist are anatomical tunnels on the back of the wrist that contain tendons of muscles that extend as opposed to flex the wrist and the digits fingers and thumb. The extensor tendon compartments of the wrist are six tunnels which transmit the long extensor tendons from the forearm into the hand they are located on the posterior aspect of the wrist.

Extensor tendon compartments ligaments of the fingers flexor pulley system blood supply to hand wrist ligaments biomechanics. Extensor tendon injuries and tenosynovitis represent clinical situations in which knowledge of this anatomy is use. Advantages over static immobilization and dynamic splinting.

Mp joints of fingers.

Flexor Tendon Anatomy Flexor Tendon System Flexor Muscles