NETA Personal Trainer Practice Exam

In which type of movement do the peroneus longus and peroneus brevis play a crucial role?

1. Foot inversion

2. Foot eversion

3. Foot dorsiflexion

4. Foot plantarflexion

The correct answer is: Foot eversion

The peroneus longus and peroneus brevis are two muscles located in the lateral compartment of the leg that are primarily responsible for foot eversion. Eversion refers to the movement of the foot that tilts the sole outward, away from the midline of the body. These muscles contract to produce this movement, making them essential for maintaining balance and stability during activities such as walking, running, and jumping on uneven surfaces. Foot inversion, on the other hand, is the opposite movement, where the sole of the foot turns inward, and it is primarily facilitated by other muscles, including the tibialis anterior and tibialis posterior. Dorsiflexion involves raising the foot upward toward the shin, which is primarily controlled by muscles in the anterior compartment of the leg. Lastly, plantarflexion is the movement of pointing the toes away from the shin and is driven by calf muscles like the gastrocnemius and soleus. Thus, the crucial role of the peroneus longus and peroneus brevis is specifically tied to foot eversion.