What muscle group primarily facilitates ankle eversion?

The peroneus group, also known as the fibularis muscles, primarily facilitates ankle eversion. This group includes the peroneus longus and peroneus brevis, which are located on the lateral side of the lower leg. Their primary function is to pull the foot outward, away from the midline of the body, thereby enabling eversion. This action can be particularly useful in various movements that require stability and balance, such as when walking on uneven surfaces.

In contrast, other muscle groups listed do not primarily contribute to eversion. The anterior tibialis group is mainly involved in dorsiflexion of the ankle and does not play a significant role in eversion. The calf muscles, which include the gastrocnemius and soleus, are primarily responsible for plantarflexion of the foot. The quadriceps group, located in the front of the thigh, is primarily involved in knee extension and does not influence the movement of the ankle in the context of eversion. Thus, the peroneus group is clearly the correct answer, as it is specifically adapted for the action of eversion at the ankle joint.