What muscle groups are the most important in flexion and extension of the knee?

At the knee joint, flexion and extension are the main movements, which are caused by the quadriceps group of muscles. This group consists of four muscles – rectus femoris, vastus medialis, vastus intermedius and vastus lateralis – and is located on the anterior thigh.

What muscle groups are the most important in flexion of the knee?

Flexion and extension are controlled by opposing muscle groups. The hamstrings flex the knee, while the quadriceps extend it.

What muscle groups are the most important in extension of the knee?

The one muscle that extends the knee is the massive quadriceps. We saw it briefly in the last section. We’ll take a better look at it now. The main flexors of the knee are the so-called hamstring muscles, semi-membranosus, semitendinosus, and biceps femoris.

What muscle groups are the most important in flexion and extension of the knee case study?

The muscle groups important in knee extension are the sartorius and quadricep femoris muslce groups. The muscle groups important in knee flexion are the biceps femoris, semitendinosus, and semimembranosus muscles.

What muscles are used for knee extension?

Dr. Laskowski: The knee extension is an exercise you can do with a weight machine to work the muscle on the front of the thigh. Specifically, the knee extension targets the quadriceps muscle. Strong quadriceps muscles make it easier to walk, run, jump and squat.

What muscle is responsible for flexing the leg?


The quadriceps femoris muscle group straightens the leg at the knee. The hamstrings are antagonists to the quadriceps femoris muscle group, which are used to flex the leg at the knee. The muscles located in the leg that move the ankle and foot are divided into anterior, posterior, and lateral compartments.

Where is the gracilis muscle?

The gracilis muscle originates from the inferior ischiopubic ramus, and body of pubis. The gracilis muscle decends almost vertically down the leg and inserts on the medial tibia at the Pes anserinus.

What is the soleus muscle?

soleus muscle, a flat, broad muscle of the calf of the leg lying just beneath the gastrocnemius muscle. It arises from the upper portions of the tibia and fibula, the bones of the lower leg, and then joins with the gastrocnemius to attach via the Achilles tendon at the heel.

What is the adductor group?

The hip adductors are a group of five muscles located in the medial compartment of the thigh. These muscles are the adductor longus, adductor brevis, adductor magnus, gracilis, and pectineus. Due to their position, the hip adductors shape the surface anatomy of the medial thigh.

Where are the adductor muscles?


The adductors are a group of muscles, as the name suggests, that primarily function to adduct the femur at the hip joint. Although they are all located somewhere along the medial side of the thigh, they originate in different places at the front of the pelvis. Most of them are surprisingly thin muscles.

Which muscle group is found on the anterior part of the thigh?

Three major muscles (actually, two muscles and one muscle group) comprise the anterior compartment of the thigh — the pectineus, sartorius and quadriceps femoris.

Does the adductor magnus flex the knee?

Since it crosses the joint, it acts on to different parts of the leg; it causes adduction at the thigh and flexion at the knee. It is innervated by the obturator nerve (L2-L4). Adductor Magnus is the largest muscle of the medial compartment, lying posteriorly of the group.

What 3 muscles are in the abductors?

The primary hip abductor muscles include the gluteus medius, gluteus minimus, and tensor fasciae latae; the piriformis, sartorius, and superior fibers of the gluteus maximus are considered secondary hip abductors.

What muscles perform hip extension?

The primary hip extensors are the gluteus maximus and the hamstrings (i.e., the long head of the biceps femoris, the semitendinosus, and the semimembranosus).

What are flexor muscles?

flexor muscle, any of the muscles that decrease the angle between bones on two sides of a joint, as in bending the elbow or knee. Several of the muscles of the hands and feet are named for this function.

How many muscles are in the adductor group?

There are four muscles in this group; adductor longus, adductor brevis, adductor magnus, and gracillis.

Which muscles are adductors and abductors?

Your abductor and adductor muscles are in your hips and thighs, working in sync to enable you to move your legs sideways. Your abductor muscles are responsible for moving your leg away from your body’s midline, while the adductors are responsible for moving the leg back towards your body’s midline.

Which of the following muscles is a leg adductor?

Adductors include five muscles: gracilis, obturator externus, adductor brevis, adductor longus and adductor magnus. They are on the inside of the thigh, starting at the pelvis and extending to the femur (thigh bone).