Flexor digitorum brevis muscle

Flexor digitorum brevis muscle

Muscle infobox
Name = Flexor digitorum brevis muscle
Latin = musculus flexor digitorum brevis
GraySubject = 131
GrayPage = 491


Caption = Muscles of the sole of the foot. First layer. (Flexor digitorum brevis visible at center.)


Caption2 = The plantar arteries. Superficial view. (Flexor digitorum brevis visible at center.)
Width = 207
Origin =
Insertion =
Action = flexes lateral four toes
Antagonist = Extensor digitorum longus, Extensor digitorum brevis
Blood =
Nerve = medial plantar nerve
MeshName =
MeshNumber =
DorlandsPre = m_22
DorlandsSuf = 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

External links

*
*
* - "The Foot: Muscles"
*
* [http://www.ptcentral.com/muscles/musclelegs.html#flexor%20digitorum%20brevis PTCentral]


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