CompartmentComponent(s)1Abductor pollicis longus tendon Extensor pollicis brevis tendon2Extensor carpi radialis longus tendon Extensor carpi radialis brevis tendon3Extensor pollicis longus tendon4Extensor digitorum tendons Extensor indicis tendon
How many compartments are in the wrist?
The dorsal extensor tendons pass under an extensor retinaculum and are divided into 6 compartments, as follows: Radial wrist abductor (abductor pollicis longus tendon) and thumb extensor (extensor pollicis brevis tendon) dorsal to the trapezium bone.
What are dorsal compartments in hand?
The hand is comprised of eleven separate compartments. These are the four dorsal interossei, three volar interossei, the thenar, the hypothenar, the adductor, and the mid-palm compartments, respectively. [2] The dorsal interossei act to abduct the digits, and the volar interossei act to adduct the digits.
What are the 6 dorsal compartments of the wrist?
In the dorsal aspect of wrist , tendons are arranged in 6 compartments. It starts with Abductor Pollicis Longus ,Extensor Pollicis Brevis ,Extensor Carpi Radialis Longus ,Extensor Carpi Radialis Brevis ,Extensor Pollics Longus, Extensor Indicis , Extensor Digitorum ,Extensor Digiti Minimi, and Extensor Carpi Ulnaris .Where is the first dorsal compartment of the wrist?
The first dorsal compartment of the wrist includes the tendon sheath that encloses the abductor pollicis longus and the extensor pollicis brevis tendons at the lateral border of the anatomic snuffbox. The Finkelstein test is performed by having the patient make a fist with the thumb inside the fingers.
How many extensor compartments are in the wrist?
There are six extensor compartments of the wrist that serve as tunnels for tendons to pass from the forearm to the wrist. [9] At the wrist, the extensor retinaculum of the hand overlies the tendons of the extensor compartment of the wrist.
What are extensor compartments?
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 tendons are held in place by the extensor retinaculum.
What are the compartments of the forearm?
The forearm is the region of the body spanning from the elbow to the wrist. It consists of several muscles and an extensive neurovascular network encased in three compartments. These include the anterior compartment, posterior compartment, and the mobile wad.What is the fourth extensor compartment?
The fourth compartment consists of the tendons of extensor digitorum and extensor indicis. Extensor tendon tenosynovitis is an important cause of wrist pain and significant morbidity.
What is extensor Retinaculum wrist?The extensor retinaculum is a fibrous thickening of the investing fascia, extending around the wrist to become continuous with the volar carpal ligament.
Article first time published onWhat are the compartments of the arm?
The compartments of the arm are the anterior compartment of the arm and the posterior compartment of the arm, divided by the lateral and the medial intermuscular septa. The compartments of the forearm are the anterior compartment of the forearm and posterior compartment of the forearm.
How many compartments does the arm have?
Anatomically, the upper arm contains three compartments including the anterior (flexor), posterior (extensor), and the deltoid compartment.
What is Vaughan Jackson syndrome?
The term Vaughan-Jackson syndrome refers to disruption of the digital extensor tendons, beginning on the ulnar side of the hand and wrist with the extensor digiti minimi (EDM) and extensor digitorum communis (EDC) tendon of the small finger.
What is the second extensor compartment?
The second dorsal compartment of the wrist is comprised of the extensor carpi radialis brevis (ECRB) and extensor carpi radialis longus (ECRL).[1][2][4]
Where is the first extensor compartment of the hand?
The first extensor compartment is located on the lateral (radial) aspect of the wrist. It transmits two tendons: Extensor pollicis brevis.
What is first dorsal extensor compartment?
Surgical Treatment Option: First Dorsal Compartment Release First dorsal compartment release is a surgical procedure that involves releasing the tendon sheath to relieve the constriction of the tendons as they pass though the sheath.
How do you remember the compartments of the hand?
These compartments contain tendons of muscles that pass from forearm to hand. The number of tendons passinf thorugh the compartments (radial to ulnar) can be remembered using the mnemonic: 2-2-1-2-1-1.
Where are wrist extensors located?
The extensor carpi radialis longus is a long muscle located on the lateral (radial) aspect of the forearm. It arises from the lateral supracondylar ridge of humerus and the lateral intermuscular septum of the arm.
Where is Lister's tubercle?
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.
How many dorsal compartments house your extensor tendons over the back of your wrist?
There are in fact 6 separate compartments on the back (dorsum) of the wrist that contain tendons of muscles that extend (as opposed to flex) the wrist and the fingers and thumb.
Where is the extensor pollicis longus?
Extensor pollicis longus (EPL) is a long muscle located at the deep layer with extensor pollicis brevis, abductor pollicis longus, extensor indicis, and supinator muscle in the posterior compartment of the forearm.
What extensor means?
Definition of extensor : a muscle serving to extend a bodily part (such as a limb)
What is extensor compartment tenosynovitis?
Extensor tenosynovitis occurs when this type of inflammation affects the tendons of the wrist and hand, which enable and control the movements of the hand. Tendon injury (or injury to the associated muscle and bone) resulting in tenosynovitis is common among athletes.
What are the wrist extensors?
The wrist extensors are a group of nine individual muscles on the back of the forearm that act on the wrist and fingers. Collectively, their primary function is wrist extension, though they also help carry out other movements of the wrist and fingers.
How many extensor tendons are in the wrist?
Extensor carpi radialis brevis (ECRB) tendon The ECRB tendon is one of 3 tendons, including ECRL and ECU, which act together to bend back the wrist.
What is the posterior compartment?
The muscles in the lower leg are divided into a number of compartments by ‘sleeves’ of thick, inelastic connective tissue. The deep posterior compartment is the compartment directly behind the shin bone (tibia) and underneath the large calf muscle.
What compartment is Brachioradialis?
The brachioradialis, flexor of the elbow, is unusual in that it is located in the posterior compartment, but it is actually a muscle of flexor / anterior compartment of the forearm. The anconeus, assisting in extension of the elbow joint, is by some considered part of the posterior compartment of the arm.
What is a wrist?
Your wrist connects your hand to your forearm. It is not one big joint; it has several small joints. This makes it flexible and allows you to move your hand in different ways. The wrist has two big forearm bones and eight small bones known as carpals. It also has tendons and ligaments, which are connective tissues.
Where does extensor retinaculum attach?
The extensor retinaculum is attached laterally to the lateral margin of the radius. However, it is not attached to the ulna, as the distance between these two bones varies with supination and pronation of the forearm.
What attached to extensor retinaculum?
Anatomical Parts The extensor retinaculum (dorsal carpal ligament; posterior annular ligament) is an anatomical term for the thickened part of the antebrachial fascia that holds the tendons of the extensor muscles in place.
Which bone is attached to flexor and extensor retinaculum?
These four bony points are all palpable in the living hand and it should be noted that pisiform is the only carpal bone that gives attachments to both flexor and extensor retinacula.
