Muscle Anatomy

extensor digitorum longus

The Extensor Digitorum Longus muscle is situated in the anterior compartment of the leg, contributing to the musculature of the lower limb. Characterized by a robust and elongated structure, it plays a significant role in foot and toe movement.

Originating from the lateral condyle of the tibia and the fibula's proximal part, the Extensor Digitorum Longus takes its starting point from the bony structures of the lower leg. This origin provides the foundation for the muscle's extension along the anterior aspect of the leg.

The muscle inserts into the dorsal surface of the middle and distal phalanges of the lateral four toes. This insertion site establishes a crucial connection with the toes' skeletal structure, influencing their extension.

Functionally, the Extensor Digitorum Longus is responsible for extending the lateral four toes at the metatarsophalangeal (MTP) and interphalangeal (IP) joints. It actively participates in dorsiflexion of the foot, aiding in the lifting of the toes during the swing phase of walking. Additionally, the muscle plays a role in toe clearance during the swing phase, preventing dragging of the toes on the ground. The Extensor Digitorum Longus contributes to overall foot function and gait, showcasing its importance in lower limb biomechanics.