Extensor Digitorum Longus, Anterior View

Description

Running in the anterior compartment of the leg, the extensor digitorum longus lies lateral to tibialis anterior and medial to fibularis (peroneus) longus, its fusiform belly occupying the anterolateral shin. Distally, its tendon divides into four slips that course anterior to the ankle under the extensor retinacula and continue toward the dorsum of digits two through five. Proximally, the muscle arises from the lateral condyle of the tibia and the anterior surface of the fibula, with fibers converging inferiorly toward the central tendon. Extensor hallucis longus typically appears as a narrower, more medial tendon between tibialis anterior and extensor digitorum longus. This anterior-oriented rendering matters because it frames extensor digitorum longus in the same topography used during clinical exam and anterior ankle approaches. Pain or paresthesia in the first dorsal web space raises concern for deep fibular (peroneal) nerve entrapment, and this nerve travels with the anterior tibial artery along the deep surface of these extensors before becoming the dorsalis pedis artery at the ankle. A clear map of the tendons as they cross the ankle also supports teaching of foot drop patterns and the gait consequences of weakness in dorsiflexors and toe extensors. Small relationships, big implications. Use this plate for lower-limb anatomy blocks, kinesiology and gait lectures, and surgical education on anterior compartment fasciotomy landmarks and tendon identification in extensor tendon repair. It also suits textbooks or patient-facing materials explaining anterior shin pain and exertional compartment syndrome in the anterolateral leg. Anatomical accuracy verified by SciePro's Medical Advisory Board.