| Extensor digitorum brevis muscle | |
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| The mucous sheaths of the tendons around the ankle. Lateral aspect. (Extensor dig. brevis labeled at upper right.) | |
| Latin | musculus extensor digitorum brevis |
| Gray's | subject #131 490 |
| Origin | dorsal surface of calcaneus |
| Insertion | proximal dorsal region of middle phalanges 2, 3 & 4 |
| Artery | dorsalis pedis artery |
| Nerve | deep peroneal nerve |
| Actions | extends digits 2 through 4 |
| Antagonist | Flexor digitorum longus, Flexor 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.
Contents |
Structure
The extensor digitorum brevis is found on the dorsal aspect (top) of the foot. It arises with the extensor hallucis brevis muscle from the calcaneus bone; many consider these two muscles are a single common muscle.
The extensor digitorum brevis divides into three tendons, which insert on the second, third, and fourth middle phalanges.
Innervation
The extensor digitorum brevis is innervated by the deep fibular nerve (deep peroneal nerve).
Action
The extensor digitorum brevis help to extend the toes to which it attaches.
See also
Additional images
 Bones of the right foot. Dorsal surface. |
 Muscles of the front of the leg. |
 Cross-section through middle of leg. |
External links
- LUC edbf
- -583729075 at GPnotebook
- SUNY Labs 16:st-0405 - "The Foot: Muscles"
- extensor+digitorum+brevis+muscle at eMedicine Dictionary
- Roche Lexicon - illustrated navigator, at Elsevier 39960.000-1
- PTCentral
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