The extensor retinaculum of the wrist is the broad ligamentous sheet located at the dorsal aspect of the wrist and functions to keep the extensor tendons in alignment and prevent bowstringing during movement.

What is the role of the extensor retinaculum?

It is a complex variable fibrous structure, whose functions are to prevent dorsal bowstringing of the extensor tendons and to prevent radial and ulnar displacement of extensor tendons. We recommend that a portion of the extensor retinaculum be preserved or reconstructed at the time of dorsal wrist surgery.

What is Retinacula function?

A retinaculum (plural retinacula) is a band of thickened deep fascia around tendons that holds them in place. ... Its function is mostly to stabilize a tendon. The term retinaculum is New Latin, derived from the Latin verb retinere (to retain).

What is the function of the extensor retinaculum quizlet?

Thickening of fascia on the dorsal side of hand. Functions to keep extensor tendons in position to prevent bowstringing.

What is a Retinaculum quizlet anatomy?

Retinaculum, tendons that are enclosed by protective tendons sheaths, the entire group of tendons is covered by a tiny but strong band of connective tissue called retinaculum.

Extensor Retinaculum

31 related questions found

What is a Retinaculum anatomy?

Retinacula are thickenings of tissue underneath your skin that serve to bind down tendons of muscles so they don't “bowstring” at certain joints, meaning pop up when the joint is flexed or extended.

What happens if you tear your retinaculum?

When functioning correctly, tendons glide under these retinacula without hindrance. With injury (trauma, repetitive strain), the retinaculum can become a site of tendon restriction, nerve impingement, and circulatory compression. Injury to the retinaculum will cause mechanical and neurological damage.

What is retinaculum quizlet?

Retinacula - are structures that bind down and hold tendons in place. There are 5 in the tarsal area. Da1) Crural extensor/ Proximal extensor. Da2)Tarsal extensor/Middle extensor. Da3)Metatarsal extensor/Distal extensor.

Why is the flexor retinaculum important?

The flexor retinaculum protects nine of the forearm flexor tendons and median nerve as they pass through the carpal tunnel. [1] If this tissue becomes inflamed, swollen, or fibrotic, the median nerve can become irritated or compressed, leading to carpal tunnel syndrome.

Does extensor tendonitis hurt all the time?

The discomfort is usually felt around the midpoint of the dorsal (top) of the foot. You may experience extensor tendonitis in both feet, but often only one foot is affected. The pain usually builds gradually as use of the injured tendon continues.

Is the extensor retinaculum a tendon?

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. It is located on the back of the forearm, just proximal to the hand.

Where is flexor digitorum Superficialis?

Flexor digitorum superficialis (flexor digitorum sublimis) is an extrinsic flexor muscle of the fingers at the proximal interphalangeal joints. It is in the anterior compartment of the forearm.

Why does my flexor retinaculum hurt?

This can occur from swollen varicose veins, a tumor (noncancerous) on the tibial nerve, and swelling caused by other conditions, such as diabetes. As pressure increases in the tarsal tunnel, the nerve is the most sensitive to the pressure and is squeezed against the flexor retinaculum.

Can you tear your flexor retinaculum?

Medial flexor retinaculum injuries are not uncommon, but medial flexor retinaculum periosteal avulsion injuries are rare. This patient sustained a medial flexor retinaculum tear readily characterized at computed tomography by an associated proximal retinacular avulsion fracture from the posteromedial tibia.

What goes above flexor retinaculum?

Structure. The flexor retinaculum is a strong, fibrous band that covers the carpal bones on the palmar side of the hand near the wrist. ... The ulnar artery and ulnar nerve, and the cutaneous branches of the median and ulnar nerves, pass on top of the flexor retinaculum.

Which of the following muscles of mastication would be responsible?

The masseter muscle is one of the four muscles responsible for the action of mastication (chewing). When the masseter contracts it causes powerful elevation of the mandible causing the mouth to close.

Which of the following best describes the insertion of the extensor digitorum?

Which of the following best describes the insertion of the extensor digitorum? It indirectly inserts on all digits of the hand.

What are groups of muscles separated by?

Skeletal muscle tissue is composed of numerous muscle fibers which are separated from adjacent muscles and other tissues by a layer of dense, elastic connective tissue termed the fascia.

Can retinaculum repair itself?

Superior peroneal retinaculum tears are often mistaken for lateral ankle instability. These tears often do not heal readily by themselves and must be identified so that proper treatment can begin.

Does torn retinaculum require surgery?

Nonsurgical Treatment

If the injury is acute, treatment without surgery may involve placing the ankle in a short-leg cast for four to six weeks. The goals are to allow the torn retinaculum to heal and to prevent chronic subluxation. Doctors may have their patients begin physical therapy once the cast is removed.

How long does it take for the retinaculum to heal?

Recovery from surgery requires a moderately long period, usually in the order of 2-6 weeks of immobilization, in order to allow the retinaculum and any bony procedures to heal. This is followed by four to six weeks of fairly graduated and intensive rehabilitation.

Is retinaculum a ligament?

Posteriorly the fibers weave together with the fibers of the medial collateral ligament. Like all other tendons, the medial patellar retinaculum is made of dense regular connective tissue.

What is the function of the extensor and flexor Retinaculum?

Principal function of the flexor retinaculum is to serve as a pulley for the carpal flexor muscles and to stabilize the carpal system. In addition, The volar surface gives rise to muscles of the thenar and hypothenar eminences. It is Related to the tendon of the palmaris longus.

What is the inferior extensor Retinaculum?

The inferior extensor retinaculum (IER) is a retaining aponeurotic structure located on the anterior aspect of the ankle and tarsus that is continuous with the sural fascia. ... It is a complex structure with three or four bands, which also plays an important role in subtalar joint stabilisation.

Can you tear Retinaculum?

The stripped-off periosteum and superior peroneal retinaculum form a pouchlike configuration lateral to the distal fibula into which the peroneal tendons can dislocate. In type II injuries, there is a tear of the superior peroneal retinaculum at its attachment to the distal fibula.