Learn more about flexor tendon injuries. EDC tendons straighten the index, middle, ring and small fingers. A common muscle belly is shared by all the fingers. The tendons travel down the forearm through a tough band of tissue on top of the wrist. The band of tissue, or retinaculum, holds the tendons in place but allows them to slide up and down the arm. The four tendons then continue along the back of the hand and onto each finger. In the finger, the ends of other tendons that start in the hand join with them to make the fingers move.
Together, these combined tendons extend the fingers at the three finger joints. The EDM straightens the small finger. It works with the extensor digitorum communis to the small finger. The muscle belly is in the forearm. The tendon travels through a tough band or retinaculum at the wrist and then into the hand.
It works with other tendons that attach to the dorsum or back of the finger to straighten the three small finger joints. The EIP tendon straightens the index finger. It works with the extensor digitorum communis to the index finger. It has its own muscle belly in the forearm and then, as it becomes a tendon, it travels through a tough band, or retinaculum, in the wrist. It travels down the hand and attaches to the back of the index finger to straighten the three index finger joints.
The APL tendon runs on the radial side of the wrist the side the thumb is on. Its muscle belly is in the forearm and then travels inside a tough band, or retinaculum, across the wrist. It attaches to the metacarpal bone of the thumb and helps pull the thumb away from the rest of the hand. This tendon along with the extensor policies brevis tendon can get inflamed and painful. The FPL tendon bends the thumb.
It is unique to humans. It starts as a muscle in the forearm and then travels as a tendon in the wrist through the carpal tunnel. It is then covered by a tunnel, or sheath, and inserts into the most distal farthest from your body bone in the thumb. The EPL straightens the most distal farthest from your body joint of the thumb.
Its muscle belly is in the forearm and the tendon travels along the wrist and enters the third compartment of the band that holds the tendons in position at the wrist. It then travels around a prominent part of the radius bone that acts like a pulley. The tendon then attaches to the most distal bone in the thumb.
The EPB tendon is in the forearm and then runs along the radial side of the wrist. This tendon also travels in the first compartment of the band that holds the tendons in position at the wrist. All of these muscles belong to the posterior compartment of the forearm, a classification that can be subdivided into superficial and deep layers:. These muscles originate from different points on the posterior surfaces of the ulna and radius, and on the distal humerus.
Their fibers travel distally, down the back of the forearm, and insert on the back of the carpals, metacarpals and phalanges.
All extensors are parallel-oriented fusiform muscles, except for the extensor digitorum, which has an oblique fiber orientation and a unipennate architecture.
Note: The table below includes just the exercises that directly target the wrist extensor muscles. When using these techniques, give special attention to the common trigger points shown in the image below. Nice article and review. I had surgery on my forearm for anterior interosseous nerve entrapment. Presumably because of postoperative scarring, my wrist extension on that side is limited, making cleans etc painful.
Thank you. Hi Fred, thanks for reading and commenting. If you still have to be in an actual brace i. Additionally, or alternatively, you could look into using athletic tape on your wrists. They both arise from the medial epicondyle, where they share a massive tendon of origin, the common flexor tendon, with two other flexor muscles. In addition, flexor carpi ulnaris has an extensive ulnar head, which arises from this border of the ulna. The two wrist flexors diverge, to arrive at the radial and ulnar sides of the wrist.
Flexor carpi radialis passes through a deep ligamentous tunnel, and ends up inserting on the base of the second metacarpal. Flexor carpi ulnaris inserts on the pisiform bone. From the pisiform, the pull of flexor carpi ulnaris is transmitted to the hamate bone, and to the base of the fifth metacarpal, by these strong ligaments, the piso-hamate and piso-metacarpal ligaments.
The two wrist flexors, acting together, produce flexion of the wrist. Acting separately, the ulnar and radial flexors contribute to ulnar abduction, and radial abduction respectively. Lying between these two main wrist flexors is a third small one, palmaris longus.
It arises from the medial epicondyle, like the other two. Its tendon, seen here in the intact forearm, lies superficial to all its neighbors, and inserts not into bone, but into this dense layer of fascia, the palmar aponeurosis, which covers the palm of the hand. Through this soft tissue insertion, palmaris longus helps to flex the wrist. Here they are: extensor carpi radialis longus, and brevis, Here they are: extensor carpi radialis longus, and brevis, and extensor carpi ulnaris.
Extensor carpi radialis longus arises from the lateral epicondylar ridge, just below brachioradialis.
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