Muscle Peroneus Longus

The peroneus longus muscle (lat. Musculus peroneus longus) is a muscle located on the back surface of the lower leg. It belongs to the group of foot flexor muscles and is involved in the process of flexion and inward rotation of the foot. This muscle is a continuation of the fibula and starts from the head of the fibula and ends on the medial surface of the calcaneus.

The peroneus longus muscle consists of two parts: anterior and posterior. The anterior part starts from the medial malleolus and ends at the head of the fibula. The posterior portion begins at the medial condyle of the femur and ends at the calcaneofibular ligament. The muscle forms two tendons that attach to the medial edge of the calcaneus and to the medial side of the ankle.

Functions of the peroneus longus muscle:

– flexion of the foot at the ankle joint;
– turn the foot inward;
– participation in the formation of the arch of the foot.

Injuries to this muscle can lead to disruption of its function and the development of various foot diseases, such as flat feet, clubfoot, etc.

To prevent injuries and diseases of the foot, it is necessary to monitor correct posture, correctly distribute the load on the legs while walking and running, and use orthopedic shoes and insoles if necessary. It is also necessary to regularly engage in sports and physical exercise to strengthen the leg muscles and prevent diseases of the musculoskeletal system.

The peroneus muscle is one of the long muscles of the leg and is a continuation of the fibula from the foot to the knee. It takes part in the extension of the foot, flexion of the knee, and also plays the role of a stabilizer during walking and running.

The peroneus longus muscle is located on the inside of the lower leg, partially covered by tendons of muscles that extend and flex the joints. As a result of insufficient development of the muscle, muscle weakness may occur when bending the knee.