Flexor digitorum profundus muscle
From Wikipedia, the free encyclopedia
| Flexor digitorum profundus muscle | ||
|---|---|---|
| Front of the left forearm. Deep muscles. (Flexor digitorum profundus visible at center left.) | ||
| Cross-section through the middle of the forearm. (Flexor digitorum profundus visible at center right.) | ||
| Latin | musculus flexor digitorum profundus | |
| Gray's | subject #125 448 | |
| Origin: | ulna | |
| Insertion: | Distal phalanges | |
| Blood: | ||
| Nerve: | median and ulnar nerves | |
| Action: | ||
| Dorlands/Elsevier | m_22/12549089 | |
In human anatomy, the flexor digitorum profundus is a muscle in the forearm that flexes the fingers. It is considered to be an extrinsic muscle because it action is at a different location to the main body of the muscle.
Flexor digitorum profundus, along with flexor digitorum superficialis have long tendons that run down the arm and through the carpal tunnel and attach to the palmar side of the phalanges of the fingers. This muscle originates from the anterior side of the ulna.
Flexor digitorum profundus lies deep to superficialis, but it attaches more distally. To get around this problem profundus's tendons go through the tendons of superficialis, and end up attaching to the distal phalanx.
[edit] Innervation
Flexor digitorum profundus is innervated by the median and ulnar nerves.
- The medial aspect of the muscle (which flexes the 4th and 5th digit) is supplied by the ulnar nerve (C8, T1)
- The lateral aspect (which flexes the 2nd and 3rd digit) by the median nerve (via its anterior interosseous branch) (C8, T1).
It is one of two flexor muscles that is not exclusively supplied by the median nerve (the other is flexor carpi ulnaris).
[edit] External link
de:Musculus flexor digitorum profundusfr:Muscle fléchisseur profond des doigts hu:Mély ujjakat hajlító izom sv:Flexor digitorum profundus
