What is the primary function of the extensor digitorum longus?

The extensor digitorum longus is primarily responsible for dorsiflexion of the foot, meaning it plays a crucial role in raising the front of the foot toward the shin. This action is essential in activities such as walking, running, and any motion where the foot must clear the ground. Additionally, the extensor digitorum longus also extends the toes, but its most significant and direct function is related to dorsiflexing the foot.

Understanding this muscle's role can be critical for sports massage therapists when addressing issues related to foot and ankle movement, particularly for athletes who require strong dorsiflexion for optimal performance. Recognizing the primary function helps in designing appropriate rehabilitation and strengthening programs.