Peroneus Longus And Everything You Need To Know About It

Peroneus Longus And Everything You

Every bone and muscle like the peroneus longus plays an integral part in our everyday life. Without these muscles and each part of our body, we won’t be able to work typically and won’t be able to perform every day to day functions. So it is essential to know about that. Understanding every aspect of your body to recognize the problem you are facing at the moment.

Peroneus longus

Peroneus longus is the muscle in your leg. This muscle helps in the movement and stabilization of your ankle. Peroneus longus is present in your leg along with the peroneus brevis and peroneus tertius. Peroneus longus and brevis are present in the lateral side of the leg. It courses downwards to your leg and attaches to your foot. With the help of this muscle, you can move your leg and ankle in various directions. However, you won’t do simple tasks like running and walking when you have to go through an injury. The peroneus longus is also known as the fibularis longus.

Anatomy of peroneus longus

The peroneus longus is present on the outer part of your leg. The peroneus longus originates from the fibula. It is present on the upper half shaft of your fibula on the outer side of your leg. This muscle then courses down towards your ankle by peroneus brevis and peroneus tertius. It turns into a tendon that attaches to the bottom of your foot. The tendon attaches to the medial cuneiform bone and also to the first metatarsal bone. This muscle is the extrinsic ankle muscle that originated from your leg and to your ankle.

A thick band of tissue known as the superior peroneal retinaculum holds this tendon in place near your lateral ankle. This muscle is superficial, and you can easily see it when it contracts upon the rotation of your ankle. Upon rotation, this muscle contracts and appears beside your leg. the superficial peroneal nerve is the one that provides neuronal supply to the peroneus longus. This peroneal nerve starts from the lumbar level five and sacral level one and two. Blood supply from this muscle comes from the anterior tibial and peroneal arteries.


  • This muscle is present on the lateral side of your leg. This muscle attaches to the lateral side of your foot and the bottom of your foot. When your muscle contracts, this will cause the movement of your ankle to the eversion. This ankle moves towards the side of your smallest toe. With the help of this muscle, the calf muscle also flexes your foot, pointing your foot downwards.
  • This muscle also helps your leg to stabilize your balance when you are standing on one leg. In addition, this muscle helps your lower leg stabilize. It is one of the strongest muscles and, with the help of the associated tendon, can withstand high forces during ruining and walking.
  • During your knee surgery, this muscle is used for an anterior cruciate ligament graft. This is done due to high tensile ligament strength. Therefore, the research can be used as a knee ligament without significant ankle and foot function loss.

Conditions regarding peroneus longus

Any injury to this muscle can cause pain in the ankle, foot, and lower leg. following are some of the conditions that are associated with the peroneus longus

·        Peroneus tendonitis

When the tendon of the peroneus becomes inflamed and irritated, this condition is known as peroneus tendonitis. It can happen when you are overusing this uncle or when this muscle becomes impinged between your bones. Pain on the outer portion of your foot and ankle may occur due to this condition.

·        Peroneal tendon subluxation

Peroneal tendon subluxation occurs when your peroneal tendons become overstretched during the movement of your foot. This can sometimes cause pain and discomfort.

·        Pinched spinal nerve

Weakness in this muscle can happen due to a pinched spinal nerve. The spinal nerve gets impinged due to arthritic or injury to your lower back. Since the peroneus nerve originates from these, an injury to the origin can cause pain or weakness in that muscle. For example, a herniated disc is very common in older people, resulting in muscle weakness due to injury.

Rehabilitation of peroneus longus

The injury or problem in the peroneus longus can create many issues resulting in the disability of maintaining balance or moving around a bit. So rehabilitation from such injury is essential in most of the cases doctors recommend rest to the people. Following are some of the things that needed to be done for rehabilitation

·        Rest

Rest ions are one of the essential factors in rehabilitation. Injuries like these need time to heal, but minimal exercise is also recommended when the tendon has healed up a bit. The rest duration can vary from a few days to weeks based upon the severity of your injury. You can also require a brace or boot to limit your muscle mobility for it to heal.

·        Neuromuscular electrical stimulation

Suppose you are going through a nerve impingement. In that case, it can be treated with a procedure known as neuromuscular electrical stimulation. This way, you will be able to move your muscles, and your muscles will contract normally.

·        Strengthen exercises

Strengthening exercises are done more for prevention than for treatment. These exercises strengthen these muscles and can be taught better with the help of a physiotherapist. These exercises are also done for the weak muscles to maintain them.


This was one of the things you needed to about peroneus longus. This is one of the crucial muscles that help you in testability and mobility. Any injury to this muscle cause problem with everyday functions, affecting your peroneal and your work life. So dealing with this problem is very important. With all this knowledge, you will know what problem you are facing and how you can avoid it in the future; by ensuring that you do all of your strengthening exercises, especially when an athlete, you can also limit your injuries.

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