After rounding the lateral malleolus of the ankle, it terminates at the fifth metatarsal bone of the upper and outer side of the foot. Along with the other lateral leg muscle, the peroneus longus, the peroneus brevis plays an instrumental role in foot motion. It helps with flexion, the ability to point your foot away from the body, as well as eversion, which is tilting the sole of the foot away from the body.
Injury to the peroneus brevis is not uncommon and is most often associated with ankle fracture, sprain, or dislocation of its tendon. Painful chronic inflammatory conditions, like tendinitis, can also impact the peroneus brevis, prompting a wide range of treatment options. The peroneus brevis is composed of striated skeletal muscle fibers, which are the type that you can voluntarily control. At approximately two-thirds of the way down the fibula, the peroneus brevis coalesces into a broad flat tendon.
This tendon continues downward and towards the middle just in front of the tendon of the peroneus longus, curling behind the lateral malleolus the outer part of the ankle , crossing the ankle, to the outer foot.
Some are born with anatomical variations involving the peroneal muscles, which may or may not cause symptoms or issues. In coordination of the peroneus longus, as well as a number of other muscles of the calf and lower leg, the peroneus brevis is intimately involved in ankle and foot motion.
Since it wraps around and crosses the ankle joint, it can use this as a kind of fulcrum. Specifically, this muscle is associated with two different activities:. The location of the peroneus brevis makes it particularly prone to injury problems. Ankle and foot injuries can definitely impact this muscle and are especially damaging to its tendon. These conditions may arise:.
Treatments for sprains, dislocations, or other conditions of the peroneus brevis range from physical therapy to pharmaceutical treatments and surgeries.
Generally speaking, doctors try to explore less-invasive options before opting for surgery. Rehabilitation from peroneus brevis injury very much depends on the specific case, but here are the most common approaches taken:. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life.
Manojlovich L. Updated Anatomy, bony pelvis and lower limb, foot peroneus brevis muscle. Updated October 27, Crumbie L. Fibularis brevis muscle. Peroneal tendon disorders. Rasuli B, Schubert R. Accessory peroneal muscles: radiology reference article. Published Harvard Medical School. Recovering from an ankle sprain. Harvard Health. Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth.
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