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Eversion of Foot: Definition & Movement

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  • 0:00 Definition of Eversion
  • 1:10 Eversion Muscles
  • 1:30 Movements of Eversion
  • 2:25 Lesson Summary
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Lesson Transcript
Instructor: Catherine Konopka

Catherine has taught various college biology courses for 5 years at both 2-year and 4-year institutions. She has a Ph.D. in cell and molecular biology.

Have you ever seen a little kid walk on the inside of his feet and wonder if that's normal? In this lesson you will learn about this type of movement called eversion of the foot.

Definition of Eversion

Kids like to experiment with movement. We think it's cute when they walk on their toes or walk backwards. They are getting to know their body and figuring out how it moves. There are many ways to move ones' feet. See how many ways you can move yours!

One movement that may be a bit more difficult to do is eversion, which literally means turning the inside out. In anatomical terms, everting the foot means lifting up the lateral (i.e. outside) edge of the foot. When you do so, you'll be standing on the inside of your foot. The opposite of eversion is inversion, which is when you stand on the outside edge of your foot. Eversion and inversion are movements of the ankle in the frontal plane, which means the movements run parallel to the front and back of your body.

An easy way to remember which one is eversion is that the second letter in eversion is a 'v'. When you evert both feet (the outside edge of both feet will be lifted off the ground), your feet will make a 'v'.

The muscles used in foot eversion are the peroneus longus, peroneus brevis and peroneus tertius

Eversion uses muscles on the lateral sides of your legs, including the peroneus longus and brevis. Peroneus tertius is not shown in this image on your screen.

Eversion Muscles

The muscles of eversion all have 'e' as the second letter: peroneus longus, peroneus brevis and peroneus tertius. These muscles run on the lateral side of your leg. When these muscles shorten they pull up on the lateral bones of your foot (the 4th and 5th metatarsals) and evert your foot.

Movements of Eversion

If you haven't yet everted your foot, do it now. Does it feel kind of awkward? You may be asking yourself when do you ever actually evert your foot and use your peroneus longus, brevis and tertius muscles? Let's say you go ice skating for the first time in a while. You would probably feel your peroneus muscles the next day. When you skate, those muscles have to work a lot harder because your body weight is supported a very thin blade.

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