What attaches to the dorsal tubercle of radius? dor·sal tu·ber·cle of radius
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.
What attaches to the dorsal radial 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.
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? 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 attaches to the dorsal tubercle of radius? – Related Questions
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 also referred to as tenosynovitis of the radial wrist extensors is characterized by the radial wrist and forearm pain. Distal intersection syndrome is tenosynovitis of the third extensor compartment (extensor pollicis longus) where it crosses the second extensor compartment.
What is tubercle?
A tubercle is a small rounded point of a bone. It also refers to a nodule attached to bone, mucous membrane (moist layer lining parts of the body), or skin. The term tubercle is less commonly used to refer to skin irritation resulting from a tuberculosis (TB) infection.
What is EPL tendon?
The long extensor tendon to the thumb is called the Extensor Pollicis Longus (EPL). This tendon straightens the end joint of the thumb and also helps pull the thumb in towards the index finger. The tendon runs around a bony prominence on the back of the wrist called Lister’s tubercle.
What is anatomical snuff box?
The anatomical snuffbox is a surface anatomy feature described as a triangular depression on the dorsum of the hand at the base of the thumb. The anatomical snuffbox is visible with ulnar deviation of the wrist and extension and abduction of the thumb.
What is dorsal tubercle?
The dorsal tubercle is a ridge between the grooves for extensor carpi radialis brevis and extensor pollicis longus muscle. This definition incorporates text from a public domain edition of Gray’s Anatomy (20th U.S. edition of Gray’s Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
What does the Finkelstein test test for?
To diagnose de Quervain’s tenosynovitis, your doctor will examine your hand to see if you feel pain when pressure is applied on the thumb side of the wrist. Your doctor will also perform a Finkelstein test, in which you bend your thumb across the palm of your hand and bend your fingers down over your thumb.
Where is head of radius?
The radial head is at the top of the radius bone, just below your elbow. A fracture is a break in your bone. The most common cause of a radial head fracture is falling with an outstretched arm.
What happens to radius and ulna pronation?
Elbow. The radius articulates with the ulna in a synovial pivot joint. The radial head rotates within the annular ligament and radial notch on the ulna to produce pronation of the forearm. The radius and ulna also articulate distally in reverse to their articulation at the elbow to produce supination.
Is ulna or radius longer?
The radius is often thought of as the larger of the two long bones in the forearm because it is thicker than the ulna at the wrist, but it is thinner at the elbow. The ulna is longer than the radius by about an inch in most people, but lengths vary considerably.
What is radial tuberosity?
: an oval eminence on the medial side of the radius distal to the neck where the tendon of the biceps brachii muscle inserts.
Where is the ulnar head?
The lateral, distal end of the ulna is the head of the ulna. It articulates with the ulnar notch on the radius and with the triangular articular disc in the Wrist Joint.
Where is the ulnar tuberosity?
The ulnar (or brachial) tuberosity is a roughened depression immediately inferior to the coronoid process. It marks the insertion of the brachialis muscle, a flexor of the elbow that originates from the anterior surface of the humerus.
Does intersection syndrome go away?
Treatment of intersection syndrome is almost always easily accomplished with some simple steps. Foremost, the tendons require rest, and this means avoiding activity with the affected wrist for at least 3-5 days while the inflammation subsides. Not resting the condition will exacerbate symptoms and prolong symptoms.
How do you fix intersection syndrome?
This condition is generally treated conservatively by avoiding activities that are painful, and by immobilizing the thumb and wrist in a splint. Ice and non-steroidal anti-inflammatory medications like ibuprofen can also help with pain and swelling. Corticosteroid injections into the area are sometimes recommended.
What is intersection syndrome of the wrist?
Intersection syndrome is a condition that affects the first and second compartments of the dorsal wrist extensors. The condition is thought to occur as a result of repetitive friction at the junction in which the tendons of the first dorsal compartment cross over the second, creating a tenosynovitis.
What is the function of tubercle?
In the human skeleton, a tubercle or tuberosity is a protrusion that serves as an attachment for skeletal muscles. The muscles attach by tendons, where the enthesis is the connective tissue between the tendon and bone.
Is tubercle and granuloma the same?
…the granulomas formed are called tubercles. Granulomas also typically arise from fungal infections, and they are present in schistosomiasis, syphilis, and rheumatoid arthritis. … sealed up in hard, nodular tubercles.
How is EPL function tested?
The EPL can be tested by placing the patient’s hand flat on a table and asking the patient to lift the thumb toward the second metacarpal; the EPL can be palpated toward the ulnar side of the snuffbox if it is present.
What is the function of anatomical snuff box?
It is located at the level of the carpal bones, and best seen when the thumb is extended. In the past, this depression was used to hold snuff (ground tobacco) before inhaling via the nose – hence it was given the name ‘snuffbox’.
