Flexor digitorum brevis muscle
|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|
|Insertion||Phalanges of toe 2-5|
|Nerve||Medial plantar nerve|
|Actions||Flexes the lateral four toes|
|Antagonist||Extensor digitorum longus and Extensor digitorum brevis|
|Anatomical terms of muscle|
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.
Innervation is by the medial plantar nerve.
Slip to the little toe may occasionally be absent, where it may be replaced by a small fusiform muscle arising from the long flexor tendon or from the quadratus plantæ.
- Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine
- -342228913 at GPnotebook
- Anatomy photo:16:st-0411 at the SUNY Downstate Medical Center - "The Foot: Muscles"
- Flexor+digitorum+brevis at eMedicine Dictionary