The extensor hallucis brevis is a
muscle
Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscl ...
on the top of the foot that helps to extend the
big toe
Toes are the digits (fingers) of the foot of a tetrapod. Animal species such as cats that walk on their toes are described as being '' digitigrade''. Humans, and other animals that walk on the soles of their feet, are described as being '' pl ...
.
Structure
The extensor hallucis brevis is essentially the medial part of the
extensor digitorum brevis
The extensor digitorum brevis muscle (sometimes EDB) is a muscle on the upper surface of the foot that helps extend digits 2 through 4.
Structure
The muscle originates from the forepart of the upper and lateral surface of the calcaneus (in fron ...
muscle. Some anatomists have debated whether these two muscles are distinct entities.
The extensor hallucis brevis arises from the
calcaneus
In humans and many other primates, the calcaneus (; from the Latin ''calcaneus'' or ''calcaneum'', meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock.
S ...
and inserts on the proximal phalanx of the digit 1 (the big toe).
Nerve supply
Nerve supplied by lateral terminal branch of Deep Peroneal Nerve (deep fibular nerve) (proximal sciatic branches S1, S2). Same innervation of
Extensor Digitorum Brevis
The extensor digitorum brevis muscle (sometimes EDB) is a muscle on the upper surface of the foot that helps extend digits 2 through 4.
Structure
The muscle originates from the forepart of the upper and lateral surface of the calcaneus (in fron ...
Function
The extensor hallucis brevis helps to extend the big toe.
See also
*
Extensor digitorum brevis
The extensor digitorum brevis muscle (sometimes EDB) is a muscle on the upper surface of the foot that helps extend digits 2 through 4.
Structure
The muscle originates from the forepart of the upper and lateral surface of the calcaneus (in fron ...
*
Extensor hallucis longus
The extensor hallucis longus muscle is a thin skeletal muscle, situated between the tibialis anterior and the extensor digitorum longus. It extends the big toe and dorsiflects the foot. It also assists with foot eversion and inversion.
Struct ...
Additional Images
File:Sobo 1909 308.png, Ext. hallucis brevis labeled at center.
File:Slide1ABBAA.JPG, Dorsum of Foot. Deep dissection.
File:Slide2ABBAA.JPG, Dorsum of Foot. Deep dissection.
External links
* - "Dorsum of the foot showing the tendons that cross the ankle joint."
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Calf muscles
Muscles of the lower limb