Flexor digitorum profundus muscle
| Flexor digitorum profundus muscle | ||
|---|---|---|
Antagonist Extensor digitorum muscle | | |
| Identifiers | ||
| Latin | musculus flexor digitorum profundus | |
| TA98 | A04.6.02.036 | |
| TA2 | 2491 | |
| FMA | 38478 | |
| Anatomical terms of muscle] | ||
The flexor digitorum profundus is a
Together the
Structure
Flexor digitorum profundus originates in the upper 3/4 of the anterior and medial surfaces of the
Along with the
Flexor digitorum profundus lies deep to the superficialis, but it attaches more distally. Therefore, profundus's
The lumbricals of the hand arise from the radial side of its tendons.[1]
Nerve supply
Flexor digitorum profundus is a composite muscle innervated by the anterior interosseous nerve and ulnar nerves.
- The medial aspect of the muscle (which flexes the 4th and 5th digit) is supplied by the ulnar nerve (C8, T1).[2][3][4]
- The lateral aspect (which flexes the 2nd and 3rd digit) is innervated by the anterior interosseous branch (C8, T1).[6]
It is one of two flexor muscles that is not exclusively supplied by the median nerve (the other is
Variation
The tendon of the index finger often has a separate muscle belly.[1]
Function
Flexor digitorum profundus is a flexor of the
The tension generated by flexor digitorum profundus at the more distal joints is determined by wrist position. Flexion of the wrist causes muscle shortening at that point, reducing tension that can be generated more distally. Fingers cannot be fully flexed if the wrist is fully flexed.[8]
Other animals
In many primates, the FDP is fused with the
Additional images
-
Front of the left forearm. Deep muscles. -
Cross-section through the middle of the forearm. -
Posterior surface of the forearm. Deep muscles. -
Transverse section across distal ends of radius and ulna. -
Transverse section across the wrist and digits. -
The mucous sheaths of the tendons on the front of the wrist and digits. -
Ulnar and radial arteries. Deep view. -
Tendons of forefinger and vincula tendina. (Flexor digitorum profundus labeled at bottom right.) -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle -
Flexor digitorum profundus muscle
See also
- Jersey finger, a rupture of the tendon connecting to the muscle
Notes
- ^ a b c d e Platzer 2004, p 162
- ^ PMID 25435036.
- ISBN 978-1-4160-4220-4, retrieved 2020-10-22
- ^ ISBN 978-0-7020-3528-9, retrieved 2020-10-22
- ISBN 978-0-323-03386-2, retrieved 2020-10-22
- ^ ISBN 978-0-12-410390-0, retrieved 2020-10-22
- ISBN 978-0-323-06612-9, retrieved 2020-10-22
- ISBN 978-0803626348.
- ^ Tocheri et al. 2008, pp 556-7
References
- Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). ISBN 3-13-533305-1.
- Tocheri, MW; Orr, CM; Jacofsky, MC; Marzke, MW. (April 2008). "The evolutionary history of the hominin hand since the last common ancestor of Pan and Homo". J. Anat. 212 (4): 544–62. , Smithsonian)
External links
- Illustration: upper-body/flexor-digitorum-profundus from The Department of Radiology at the University of Washington
