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The Extensor Hallucis Brevis is an intrinsic muscle of the foot located on the dorsal side. The muscles located on the dorsal side of the foot are:
- Extensor digitorum brevis
- Extensor hallucis brevis
- (the dorsal interossei pedis are located superficially on the dorsal side, but are technically Plantar Layer IV muscles)
- Dorsal surface of the calcaneus to the dorsal surface of the big toe (toe #1).
- The distal attachment is onto the base of the proximal phalanx of the big toe.
- Extends the big toe at the metatarsophalangeal joint.
NOTE: The extensor hallucis brevis and extensor digitorum brevis are actually one muscle structurally, but they have been separated into two muscles for naming purposes. The term hallucis refers to the big toe; the term digit refers to toes 2-5.