Extensor Hallucis Longus, Lateral View

Description

Seen from a lateral aspect in an adult male, the extensor hallucis longus (EHL) occupies the anterior compartment of the leg, arising from the middle anterior surface of the fibula and adjacent interosseous membrane. Its fusiform belly lies between tibialis anterior (more medial) and extensor digitorum longus (more lateral), then narrows to a tendon that crosses anterior to the ankle joint under the extensor retinacula. Distally, the tendon runs along the dorsum of the foot to the great toe, passing toward the dorsal base of the distal phalanx, with the tibia medial and the fibula forming the lateral malleolar contour posterior to the tendon’s course. This lateral projection clarifies the EHL’s line of pull for hallux extension and ankle dorsiflexion, and it also helps explain why the tendon becomes clinically conspicuous at the anterior ankle. Weakness of EHL is a common pattern in deep fibular (peroneal) nerve palsy, and the muscle can appear enlarged or overactive in gait compensation for foot drop. Tendonitis or attrition where the tendon glides beneath the extensor retinaculum, and irritation in anterior ankle impingement, are better taught when you can track the tendon’s relationship to the tibia, talus, and dorsal midfoot. Use this plate in lower-limb gross anatomy and kinesiology teaching to distinguish the anterior compartment muscles by their medial to lateral order, and in orthopedics or sports medicine content explaining extensor tendon disorders across the ankle and first metatarsophalangeal joint. It also suits neurology and rehabilitation materials that map dorsiflexor weakness patterns to deep fibular nerve lesions and L5 radiculopathy. Anatomical accuracy verified by SciePro's Medical Advisory Board.