Situated deep to the flexor retinaculum are the four tendons of the flexor digitorum superficialis.
What is the function of flexor tendons and where do they originate?
Anatomical terms of muscle The common flexor tendon is a tendon that attaches to the medial epicondyle of the humerus (lower part of the bone of the upper arm that is near the elbow joint). It serves as the upper attachment point for the superficial muscles of the front of the forearm: Flexor carpi ulnaris.
What tendons pass through carpal tunnel?
The carpal tunnel contains the median nerve, the four tendons of the flexor digitorum profundus, the four tendons of the flexor digitorum superficialis, and the flexor pollicis longus (FPL) tendon (Figure 42.1).
Is flexor retinaculum a muscle?
The flexor retinaculum is the roof of the carpal tunnel, through which the median nerve and tendons of muscles which flex the hand pass.
What tendon is FDS?
Flexor digitorum superficialis (FDS) tendons FDS tendons help bend the index, middle, ring, and small fingers at the middle finger joint. They are powered by a common muscle belly shared by all the fingers, which divides into 4 tendons. They travel down the forearm and within the carpal tunnel.
What do flexors do?
flexor muscle, any of the muscles that decrease the angle between bones on two sides of a joint, as in bending the elbow or knee. Several of the muscles of the hands and feet are named for this function.
What is Palmaris longus tendon?
Palmaris longus is the most superficial muscle of the superficial forearm flexors, found deep to the forearm skin. Just proximal to the wrist, the palmaris longus tendon sits medial to that of flexor carpi radialis, and the median nerve passes between the tendons of these two muscles.
What is a flexor tendon injury?
The ability to bend our fingers to make a fist is controlled by the flexor tendon. Most commonly, a flexor tendon injury results from lacerations (cuts). A laceration to the forearm, hand or wrist can result in injury to the flexor tendons.
What are the flexor tendons of the fingers called?
The flexor tendons of the fingers are the flexor digitorum superficialis (FDS) and the flexor digitorum profundus (FDP). Once emerging from the carpal tunnel, these tendons continue distally in pairs to each of the fingers expect the thumb.
How many flexor tendons are in the carpal tunnel?
The carpal tunnel houses 9 flexor tendons and the median nerve (Figure A) (Thomas, 2014). The flexor retinaculum (Figure B) is a strong, fibrous flexor band (O’Neill, 2008).
Where is the flexor digitorum profundus tendon located?
Just like the flexor digitorum profundus tendons, these tendons glide in sheaths along the fingers and the hand. At the level of the fingers, each tendon splits into 2 separate cords and then insert into the middle bone of the finger on either side of the flexor digitorum profundus tendon that runs farther down the finger.
