Flexor digitorum profundus muscle
| Flexor digitorum profundus muscle |
|---|
|
| origin |
| Anterior surface of the ulna , interosseous membrane , in animals also on the radius and humerus |
| approach |
| Base of the end links of the 2nd - 5th finger |
| function |
| Bend the extremities of the 2nd - 5th fingers and bend the wrist |
| Innervation |
| Median and ulnar nerves |
| Spinal segments |
| C7-Th1 |
The flexor digitorum profundus muscle ( Latin for "deep finger flexor") is one of the skeletal muscles in the deep (III.) Flexor layer of the forearm . Just like the flexor digitorum superficialis muscle , it is divided into four terminal tendons that run through the carpal tunnel . In the area of the middle phalanx of the fingers, these pull through the forked tendons of the flexor digitorum superficialis muscle. They also serve as the source of the lumbrical muscles .
In humans, the muscle originates exclusively in the ulna.
In quadruped mammals , the muscle has three muscle origins, i.e. three heads:
- Head humerale : originates from the medial epicondyle of the humerus
- Caput radiale : arises at the radius
- Caput ulnare : originates from the ulna
function
The flexor digitorum profundus muscle flexes the second to fifth fingers down to the distal phalanx, and it is also involved in flexing the hand in the wrist .