Proximal attachments
The peroneus longus connects with the lateral upper half of the fibula, the anterior and posterior internuscular septa of the leg, and the fascia cruris. The peroneus brevis connects with the lateral, lower two-thirds of the fibula, as well as the anterior and posterior intermuscular septa.

Distal attachment
The peroneus longus connects with the plantar posterolateral surface of the medial cuneiform and the lateral surface of the base of the first metatarsal. The peroneus brevis connects with the lateral surface of the base of the fifth metatarsal.

Location
The muscles are located on the outside of the leg. Their tendons pass behind the lateral malleolus, the longus tendon covering that of the brevis. On the outside of the foot, the tendons are secured by two peroneal retinaculae. From here, the longus tendon passes into the foot deep to the plantar fascia, foot muscles, and long plantar ligament. The brevis tendon continues over the lateral foot for a short while.

Innervation
Superficial peroneal nerve. The peroneus longus sometimes receives branches from the common peroneal or deep peroneal nerves.

Vascular Supply
Anterior tibial artery and peroneal artery.

Motion
Eversion.
Plantar flexion.