Quadriceps Muscles of the Leg

muscles of the leg

You’ve probably heard about the four main muscle groups in the leg. But what is their function? Let’s explore the Quadriceps group. The word quadriceps means “four-headed” and refers to both the group as a whole and the four individual muscles that make up this muscle group. Here’s a closer look at these important muscles. What is the function of each of these muscles? And how do you exercise these muscles?

Fibularis longus muscle

The Fibularis longus is a major lower leg muscle that starts at the head of the fibula and attaches to the foot. The muscle is responsible for everting and flexing the ankle and limits a person’s gait and range of motion. An injury to the muscle can result in pain, diminished motion, and difficulty walking or running. By understanding this muscle’s function and how it works, it will be easier to treat the injury.


The gastrocnemius muscle is the major bulk muscle of the lower leg. This muscle is composed of two heads and is attached to the calf via the oblique popliteal ligament, the knee joint capsule, and the lateral epicondyle of the thigh. Its function is to help control the ankle and heel, and is part of the triceps surae muscle group.

Tibialis anterior

The Tibialis anterior muscle is located in the front portion of the shin bone. It is the major foot dorsiflexor and runs from the area below the knee to the front part of the shin bone. It attaches to the front of the foot and helps raise the arch of the foot. This muscle is also responsible for stabilizing the ankle during the contact phase of walking.


The Plantaris muscle is located on the inferior lateral supracondylar ridge of the femur, and it attaches to the posterior calcaneus through the calcaneal tendons. This muscle is used to flex the leg at the knee. Below are the main actions of the Plantaris muscle and their innervations. The gastrocnemius muscle is the largest of the three muscles in the leg.


The Sartorius is the longest muscle in the human body, arising from the anterior superior iliac spine and inserting near the inner part of the thigh. The Sartorius serves to flex the hip and bend the knee. It is a vital muscle that assists in hip flexion and abduction, and the internal rotation of the leg. Its symptoms are usually associated with TrPs in the Sartorius.

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