събота, 16 февруари 2013 г.
SourceFlexor digitorum brevis muscle
From Wikipedia, the free encyclopedia
| Flexor digitorum brevis muscle | |
|---|---|
 | |
| Muscles of the sole of the foot. First layer. (Flexor digitorum brevis visible at center.) | |
[caption id="" align="alignright" width="207"]  List of images in Gray's Anatomy: VI. The Arteries (Photo credit: Wikipedia)[/caption] | |
| The plantar arteries. Superficial view. (Flexor digitorum brevis visible at center.) | |
| Latin | musculus flexor digitorum brevis |
| Gray's | subject #131 491 |
| Origin | Calcaneus |
| Insertion | Phalanges of toe 2-5 |
| Artery | |
| Nerve | medial plantar nerve |
| Actions | flexes lateral four toes |
| Antagonist | Extensor digitorum longus,Extensor digitorum brevis |
The flexor digitorum brevis lies in the middle of the sole of the foot, immediately above the central part of the plantar aponeurosis, with which it is firmly united.
Its deep surface is separated from the lateral plantar vessels and nerves by a thin layer of fascia.
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[edit]Origin and insertion
It arises by a narrow tendon, from the medial process of the tuberosity of the calcaneus, from the central part of the plantar aponeurosis, and from the intermuscular septa between it and the adjacent muscles.
It passes forward, and divides into four tendons, one for each of the four lesser toes.
Opposite the bases of the first phalanges, each tendon divides into two slips, to allow of the passage of the corresponding tendon of the flexor digitorum longus; the two portions of the tendon then unite and form a grooved channel for the reception of the accompanying long Flexor tendon.
Finally, it divides a second time, and is inserted into the sides of the second phalanx about its middle. The mode of division of the tendons of the flexor digitorum brevis, and of their insertion into the phalanges, is analogous to that of the tendons of the flexor digitorum superficialis in the hand.
[edit]Innervation
