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The anterior tibial artery, the smaller of the two terminal branches of the popliteal, reaches the front of the leg about an inch and a quarter below the head of the fibula by passing between the two heads of the tibialis posticus muscle and above the upper border of the interosseous membrane, 1903. From 'Surgical Anatomy: The Treatise of the Human Anatomy and Its Applications to the Practice of Medicine and Surgery, Volume III' (1903). The dorsalis pedis artery, the continuation of the anterior tibial, runs over the instep to the interval between the first and second metarsal bones, where it divides into two terminal branches, the dorsalis hallucis and the communicating. The musculo-cutaneous nerve passes forward and downward through the substance of ther peronous longus muscle, then between the perineus longus and brevis muscles, and lastly between the peroneus brevis and the extensor longus digitorum muscles, where it divides into two branches, an inner and an outer. (Photo by VintageMedStock/Getty Images)