The peroneal muscles, also known as the fibular muscles, are a group of muscles located on the outer side of the lower leg. They consist of two main muscles: the peroneus longus and the peroneus brevis. These muscles play a crucial role in stabilizing the ankle and foot, allowing for movements such as eversion, which is the outward turning of the foot. The peroneal muscles originate from the fibula, the smaller bone of the lower leg, and attach to various points on the foot. They help maintain balance and support during activities like walking, running, and jumping, making them essential for overall lower limb function.