Long peroneal muscle

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The long peroneal muscle is a muscle that extends from the upper outer portion of the leg to the metatarsal region. Three bundles make up the peroneal muscle. They attach to the fibula, tibia, and calcaneus, as well as to the arch in the cuboid bone near the toes. The superficial peroneal nerve innervates the peroneus longus muscle. The functions of the long peroneal muscle are the flexion and external rotation of the foot, as well as keeping the foot stable.