Anterior Perspective of the Extensor Hallucis Brevis Under the Skin

Description

Shown beneath a semi-transparent skin layer from an anterior dorsum perspective, the extensor hallucis brevis (EHB) sits on the dorsolateral midfoot, arising from the superolateral calcaneus and coursing distally toward the proximal phalanx of the hallux. Its short tendon runs medial to the muscle belly as it approaches the first metatarsophalangeal region, lying superficial to the tarsal and metatarsal cortices that include the talus proximally and the metatarsals and phalanges distally. Lateral to the hallux track, the extensor digitorum brevis often shares the same muscle mass (extensor digitorum brevis et hallucis), with tendinous slips heading toward the lesser toes. Bone landmarks remain readable through the transparency, including the tibiotalar joint line above and the dorsal contours of the midfoot. Clinically, the EHB is a reliable surface landmark on the dorsum pedis, and its relationship to the dorsalis pedis artery and the deep fibular (peroneal) nerve matters when palpating a pulse, placing arterial lines, or planning dorsal approaches for midfoot and forefoot procedures. Entrapment of the deep fibular nerve beneath the extensor retinaculum (anterior tarsal tunnel syndrome) can refer pain into the first web space, and edema or hypertrophy around the EHB region can make that diagnosis easier to teach with an anterior view. Dorsal capsulotomy for first metatarsophalangeal pathology and incision planning for dorsal ganglion excision also benefit from seeing how little soft tissue separates tendon from joint capsule. Use this artwork in lower limb anatomy teaching, podiatry and orthopaedic lecture decks, and surgical atlases that discuss dorsal foot incisions, neurovascular risk zones, or hallux extensor mechanics. It also suits patient-facing explanations of dorsal midfoot pain where a tendon and its bony targets need to be named without clutter. Anatomical accuracy verified by SciePro's Medical Advisory Board.