Flexor digitorum brevis muscle
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| Flexor digitorum brevis muscle | ||
|---|---|---|
| Muscles of the sole of the foot. First layer. (Flexor digitorum brevis visible at center.) | ||
 | ||
| The plantar arteries. Superficial view. (Flexor digitorum brevis visible at center.) | ||
| Latin | musculus flexor digitorum brevis | |
| Gray's | subject #131 491 | |
| Origin: | ||
| Insertion: | ||
| Artery: | ||
| Nerve: | plantar nerve | |
| Action: | flexes lateral four toes | |
| Antagonist: | Extensor digitorum longus, Extensor digitorum brevis | |
| Dorlands/Elsevier | m_22/12549073 | |
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.
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 sublimis in the hand.
Variations
Slip to the little toe frequently wanting, 23 per cent.; or it may be replaced by a small fusiform muscle arising from the long flexor tendon or from the Quadratus plantæ.
Additional images
 Bones of the right foot. Plantar surface. |
 Coronal section through right talocrural and talocalcaneal joints. |
External links
- LUC fdmf
- -342228913 at GPnotebook
- SUNY Labs 16:st-0411 - "The Foot: Muscles"
- Flexor+digitorum+brevis at eMedicine Dictionary
- PTCentral
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
