Peroneals are a group of muscles covering the outer side of the leg muscles. They include peroneus longus and peroneus brevis. They are also called fibular muscles, as they originate from the fibula bone and end on the outer side of the heel and foot.
The peroneus longus originates from the head and superior two-thirds of the lateral fibula and tibial condyle along with the intermuscular septum. It inserts on the plantar surface of the medial cuneiform and the base of the first metatarsal. It has the function of plantarflexion along with calf muscles and is a powerful evertor; it also supports longitudinal/transverse foot arches.
The peroneus brevis originates from the lower two-thirds of the lateral surface of the fibula. It inserts at the styloid process, which is located at the base of the fifth metatarsal bone. It has the function of eversion.
Both muscles are supplied by the superficial peroneal nerve, which, if damaged, causes foot drop or, in cases of hemiplegia, causes nerve damage, which also leads to foot drop.
These muscles are commonly hurt in cases of lateral ankle sprain, which causes their tendons to suffer from tendinopathy, subluxation, or splits.
Have you suffered an ankle sprain and thought about the structures damaged with a simple twist?
MBH/AB
