What describes an inversion of the foot?

Inversion of the foot refers specifically to the movement where the sole of the foot turns inward, toward the median plane of the body. This means that when a person inverts their foot, the inner edge of the sole elevates, while the outer edge lowers. This action is primarily facilitated by the muscles on the medial side, such as the tibialis anterior and the tibialis posterior.

Understanding this motion is vital in fields like physical therapy and sports medicine, as it frequently occurs during various activities and can impact one’s balance, gait, and susceptibility to injuries like ankle sprains. Inversion is contrasted with eversion, where the sole moves outward, away from the median plane. Thus, the correct description of foot inversion aligns perfectly with the movement of the sole towards the median.