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Extensor digitorum tendons. Extensor indicis tendon. Extension of the medial four digits Fourth compartment syndrome: 5 Extensor digiti minimi tendon: Positioned directly over the distal radioulnar joint. Extensor digiti minimi usually has double tendon [2] in the fifth compartment upon inserting onto the little finger Vaughn-Jackson syndrome: 6
Infectious tenosynovitis is the infection of closed synovial sheaths in the flexor tendons of the fingers. It is usually caused by trauma, but bacteria can spread from other sites of the body. Although tenosynovitis usually affects the flexor tendon of the fingers, the disease can also affect the extensor tendons occasionally. [5]
Finkelstein's test was described by Harry Finkelstein (1865–1939), an American surgeon, in 1930. [5]A similar test was previously described by Eichhoff, in which the thumb is placed in the palm of the hand and held with the fingers, and the hand is then ulnar deviated (see images), causing intense pain over the radial styloid which disappears if the thumb is released.
The extensor indicis proprius usually runs and inserts onto the ulnar side of the extensor digitorum communis of the index finger. [4] The fifth compartment is occupied by the extensor digiti minimi, the extensor of the little finger. The extensor carpi ulnaris passes through the sixth compartment to insert to the base of the fifth metacarpal bone.
Between the 1st and 2nd extensor compartments; Located in the Anatomical snuff box; not often utilized; 3-4 portal: between the 3rd and 4th extensor compartments; Located distal to Lister's tubercle; primary viewing portal; 4-5 portal: Between the 4th and 5th extensor compartments; mainly for instrumentation and visualization of TFCC; 6R portal:
There are six separate synovial sheaths run beneath the extensor retinaculum: (1st) abductor pollicis longus and extensor pollicis brevis tendons, (2nd) extensor carpi radialis longus and brevis tendons, (3rd) extensor pollicis longus tendon, (4th) extensor digitorium communis and extensor indicis proprius tendons, (5th) extensor digiti minimi tendon and (6th) extensor carpi ulnaris tendon.
Patellar tendonitis is inflammation of the patellar tendon. A physical therapist shares the 5 best exercises to help relieve patellar tendonitis pain.
The structure of the extensor pollicis et indicis communis resembles both the characteristics of the extensor pollicis longus and the extensor indicis proprius. It originates from the distal end of ulna. Its tendon passes through the extensor retinaculum in the fourth extensor compartment, splits into two and inserts to both thumb and index finger.