Most of us have sprained or fractured our ankle or foot due to some injury in our lifetime. Do you know why your ankle swells during an injury? Have you ever heard the word Eversion? What are the muscles that evert the foot? What causes the eversion of the foot and the eversion of the ankle? We will find out all the answers related to ankle and foot muscles, and the muscles that evert the foot. Read on for the answers.
1. What Movement does a Eversion?
The eversion movement means that a part of a body, say a foot, rotates in such a way that the foot’s sole turns away from the body’s midline. To understand this in a simpler way, we can say that eversion occurs when the foot rolls onto its inside portion, causing the foot to rise or surge from the ground at the outside part. (See What Structure Prevents the Backflow of Blood?)
2. What is the Eversion of the Foot?
Eversion causes the opposite motion, in which the foot’s bottom moves to point away from the midline of the body (laterally). Eversion is a literal translation of the verb evert, which means to turn outward.
The connection between the top section of the calcaneus and the bottom portion of the talus creates the subtalar joint, which is the ankle joint that allows for the inversion and eversion of the foot. The calcaneus is also referred to as the heel bone, while the talus is the huge ankle bone that links to the tibia. The subtalar joint is a synovial joint, which means the joint is lubricated and protected by synovial fluid. In the upcoming segments, you will learn about the muscles that evert the foot.
3. What does it Mean to Evert the Foot?
The meaning of evert is to turn inside out or outward. The foot is everted when its forepart is moved outward from the body’s midline. A hollow organ gets turned inside out when it is everted. Learn What Is the Funny Bone Nerve?
4. What Causes Eversion of the Foot?
Foot eversion typically results from improper foot posture and can gradually creep in as an outcome of weak inversion and eversion muscles. It usually goes unnoticed until an injury has already occurred.
5. What is an Eversion Muscle?
It consists of peroneus longus, peroneus brevis, and peroneus tertius. Your leg’s lateral side is where these muscles are located. These muscles contract and cause your foot to evert by pulling up on the 4th and 5th metatarsals, which are the lateral bones of your foot. Check out How can an ectomorph gain muscles?
6. What are the Muscles that Evert the Foot?
The eversion of the foot is influenced by a variety of muscles in the foot and ankle. Now let’s see the chart to understand the anatomy of muscles’ eversion. We will look into the details of muscles that evert the foot like the origin of eversion, the attachment or end point of eversion, and how it reacts or the action it takes.
| Muscle | Origin | Attachment of bones | Eversion’s action |
| Peroneus | Fibula’s head (Lower leg’s lateral bone) | Foot’s inner or medial point | Draws the medial side of the foot away from the midline of the body. |
| Peroneus brevis | Fibula’s other side, under the Peroneus longus | At the base of the foot’s toe | Distances the lateral side of the foot from the body’s midline. |
| Peroneus Tertius | around midway down the fibula | At the little toe’s base | pulls the foot’s medial side away from the body’s midline. |
When a person is engaged in an activity on their feet, such as standing, walking, running, leaping, or skating, these peroneus muscles support and stabilize the ankle with the aid of the muscles that invert the feet. These peroneus muscles, for instance, will unconsciously contract to draw your ankle back to the neutral position if you are standing and your feet begin to invert. Must read What is a Cellular Respiration Virtual Lab?
7. Which Muscle is the Prime Mover for Foot Inversion?
The tibialis anterior, a muscle with an essentially identical line of action to the tibialis posterior, can function as a foot invertor. It is the primary force behind foot inversion. Now let us examine the peroneus longus, brevis, and Tertius, the three muscles that evert the ankle. On the distal fibula, the peroneus brevis develops from this point. And the Peroneus longus is situated above the Peroneus Brevis. On the proximal fibula, the Peroneus longus also develops from this location. Plus, there is a gap where its origin meets the head of the fibula.
And most importantly, the peroneus longus and brevis tendons, with the longus in the back and the brevis in front, respectively, pass beneath the peroneal retinaculum at the ankle. Additionally, at the base of the fifth metatarsal, Peroneus brevis sprints forward to insert.
8. What is Eversion of the Ankle?
Ankle eversion is the result of the ankle rolling outward and rupturing the deltoid ligaments. Ankle eversion is also called an ankle sprain. The other type of ankle sprain is called ankle inversion. An ankle sprain takes place when ankle ligaments tear. These ligaments are very crucial as they keep the ankle parts in place and join them to the leg and foot’s other bones. When an ankle sprain happens due to any injury, it immediately swells the ankle’s injured part. The patient is unable to move his ankle, stand properly, or put weight on the fractured ankle.
9. What Muscles do Ankle Inversion?
The tibialis anterior, tibialis posterior, flexor digitorum, flexor hallucis, and extensor hallucis are part of the ankle invertor muscles. (See Are There 9 Holes in Human Body?)
