extensor pollicis longus muscle
The dorsal tubercle is a ridge between the grooves for extensor carpi radialis brevis and extensor pollicis longus muscle.
What attaches to Lister’s tubercle?
The prominent bony tubercle over the dorsal aspect of the distal radius, known as Lister’s tubercle, functions as a pulley for the extensor pollicis longus (EPL) tendon before the tendon pivots and turns obliquely to insert onto the distal phalanx of the thumb (1).
Which tendon travels around dorsal tubercle?
extensor pollicis longus
Function. Lister’s tubercle serves as a pulley for the tendon of extensor pollicis longus, which wraps around the medial side and takes a 45° turn.
What tendon passes medial to the dorsal tubercle of the radius?
For instance during volar plate fixation for distal radius fractures, when the screws are applied in unsuitable orientation and length, they may irritate the extensor pollicis longus (EPL) tendon which lies in the groove medial to the dorsal tubercle.
What is dorsal tubercle of radius?
Lister’s tubercle or the dorsal tubercle of the radius is a bony protuberance on the dorsal surface of the distal radius. It separates the 2nd (ECRB and ECRL) and 3rd (EPL) extensor compartments. It acts as a pulley for the EPL tendon, changing its mechanical direction of action.
What is distal intersection syndrome?
Distal intersection syndrome is the tenosynovitis of the second compartment and the third compartment, at their cross point, in the dorsal wrist. It is a rare disorder presenting with pain, swelling, and tenderness in Lister’s tubercle area of the wrist.
What is function of dorsal tubercle?
What are the 6 extensor tunnels?
Radial wrist extensors (extensor carpi radialis longus and ECRB tendons) dorsal and radial to the trapezoid bone. Extensor pollicis longus tendon. Common finger extensors (extensor digitorum communis [EDC] tendon) dorsal to the capitotrapezoid articulation.
What is the dorsal tubercle of the radius?
AboutBlogGo ad-free. Dr Henry Smith ◉ and Dr Craig Hacking ◉ ◈ et al. Lister’s tubercle or the dorsal tubercle of the radius is a bony protuberance on the dorsal surface of the distal radius. It separates the 2 nd (ECRB and ECRL) and 3 rd (EPL) extensor compartments.
What is the Dor · Sal Tu · Ber · CLE of radius?
dor·sal tu·ber·cle of radius. [TA] a small prominence on the dorsal aspect of the distal end of the radius lateral to the groove for the extensor pollicis longus tendon; it serves as a trochlea or pulley for the tendon.
Where is Lister’s tubercle on the distal radius?
Lister’s tubercle or the dorsal tubercle of the radius is a bony protuberance on the dorsal surface of the distal radius. It separates the 2nd (ECRB and ECRL) and 3rd (EPL) extensor compartments.
Where does the tendon insert on the radial tuberosity?
The two heads join in the distal arm to form one strong tendon, which inserts on the radial tuberosity on the upper end of the radius. Tendinitis results from a repetitive stress leading to microscopic tears in the tendon that can generate an inflammatory response.
