What is the quadriceps muscle?

Quadriceps. It is a group of larger muscles and the heaviest muscle in the legs. The quadriceps muscle is located in the thigh bone.

Anteriorly, the upper segment begins at the hip joint.

Above, down to the knees. The quadriceps muscles are mainly responsible for extending the knee joint, but are related to the hip bone.

The other muscles in front of the body are also involved in hip flexion. The rectus femoris muscle is a part of the quadriceps muscle, which also includes: vastus lateralis, vastus medialis, and femoris intermediadius.

The rectus femoris muscle has two beginnings, the folded end resembles the result of a quadruped stretching muscle, and the vertical end may be the result of a person's upright posture, which is a spindle-shaped muscle with wings. When you stand up, walk or climb from a seated position, your quadriceps muscles straighten your knees. The quadriceps muscles only cover the knee and are therefore only responsible for knee extension and resistance to knee flexion.

When they stretch, they can control the movement of sitting. The vastus medialis muscle is larger and heavier than the vastus lateralis muscle. The intermediaus femoris is the deepest part of the quadriceps muscle, and its anterior surface has a membranous tendon that facilitates gliding of the rectus femoris muscle that covers it.

Quadriceps tendons.

It connects and covers the kneecap, extending into the patellar ligament, all the way to the tibia. The sartorius muscle, which is not part of the quadriceps muscle, is the most superficial muscle in the anterior femoral region and the longest banded muscle in the body. Its medial border is the lateral border of the femoral triangle (adductor longus is medial and inguinal ligament is superior).

The role of the sartorius muscles is to enable the lower limbs to complete a sartorial cross-legged sitting position. (The name sartoriosis comes from Latin.)

Quadriceps tendons are beneficial for the following sports: cycling, hiking, hiking, camping, mountaineering, orienteering, ice hockey, roller skating, tandem skating, martial arts, running sports, soccer, American football, rugby.

Skiing, water skiing, surfing, race walking.

Biceps femoris. Location: Behind the thigh muscles.

Quadriceps. Location: Anterior thigh.

Difference Between Biceps and Quadriceps:

First, the location is different.

1. Biceps femoris: located behind the thigh muscles.

2. Quadriceps: located under the skin on the front and outside of the thigh, almost wrapping the entire length of the femur.

Second, the role is different.

1. Biceps femoris: Biceps femoris can flex the knee joint.

Hip extension. When the knee is flexed, the calf can be supinated. This muscle is affected by the ischia.

Innervation. 2. Quadriceps: maintain the stability of the knee joint, walk and run.

Third, the structure is different.

1. Biceps femoris muscle: the starting point consists of four heads, that is, the rectus femoris muscle.

Vesus intermediaus, vastus medialis, and vastus lateralis muscles. One of the heads (rectus femoris) arises from the anterior inferior iliac spine, and the remaining three heads arise from the femur. The four heads form a flat tendon at the lower end of the femur, which crosses the front of the knee and terminates at the tibial tuberosity.

2. Quadriceps muscle: All four muscles pass through the common tendon and patella.

Connected, the patella passes through the patellar ligament.

Attached to the tibial tuberosity.

Encyclopedia - Quadriceps.

Encyclopedia - Biceps femora.

including rectus femoris, vastus lateralis, vastus intermediadius, and vastus medialis; It can be done by swimming, or by raising your legs.

The quadriceps brachii includes the rectus femoris, vastus lateralis, vastus intermediadius, and vastus medialis muscles of the thigh; Some of the exercises are wall squats, squats, swimming, etc., which can be a good way to exercise these muscles.

The quadriceps muscles include the rectus femoris, vastus lateralis, vastus intermediadius, and vastus medialis muscles of the thigh. Opt for swimming and squatting to work your quadriceps.

The front of the thighs. It gets its name from the fact that it is made up of four muscles: rectus femoris, vastus lateralis, interfemoris and vastus medialis.

Among them, the rectus femoris muscle originates from the anterior inferior iliac spine, the other three originate from the femoral shaft, and the four heads pass through the patella and terminate at the tibial tuberosity by the patellar ligament. The quadriceps muscles are innervated by the L2 4 attack nerves. The function of the straight femoral muscle is to extend the calf and bend the thigh; The function of the remaining three muscles is to extend the calf.

The quadriceps muscles are the body's thigh muscles, located in front of the thigh muscles, and are one of the largest and most powerful muscles in the body. It is composed of vastus medialis, vastus intermediadius, vastus lateralis and rectus femoris, and its function is to flex the hip and extend the knee during the open chain movement; knee flexion under closed-chain movement; and maintain the stability of the posture.

The quadriceps muscles are essential for the function of the knee joint, and they are indispensable for walking, running, going up and down stairs, squatting, and all kinds of sports.

Therefore, the quadriceps muscles are not just a muscle, and they should not be vague when practiced

However, when practicing the quadriceps, you must not ignore the internal oblique femoris, also known as the medial head of the quadriceps.

If the quadriceps muscle is the key muscle for relieving knee pain, then the internal oblique femoris can be said to be the fighting muscle among the key muscles.

The internal oblique muscles are like teardrops, located above the anterior medial branch of the quadriceps muscle, and most people with knee discomfort will experience varying degrees of atrophy of this muscle.

Location: Front of the thighs, with four heads.

Origin: Rectus femoris muscle from anterior inferior iliac spine; The femoris medius arises from the anterior part of the body of the femur; The vastus lateralis muscle arises from the lateral lip of the thick femoral line; The vastus medialis muscle arises from the medial lip of the thick femoral line.

Abortion: The four heads merge to form a tendon that wraps around the patella and descends to form the patellar ligament and terminates at the tibial tuberosity.

Function: The rectus femoris muscle flexes the hip joint, and the overall contraction extends the knee joint.

Essentials: Place the barbell on the back of the neck in the upper oblique, hold the barbell with both hands, the grip distance is times the width of the shoulders, the feet are shoulder-width apart, the feet are on the ground, keep the body in the center, the pelvis is neutral, the abdomen is tightened, the shoulder blades are tightened, and the shoulder straps are sinking. The knee joint is straightened and does not lock.

Inhale, control the body with quadriceps, first bend the hips and then the knees, squat down along the toes until the thighs are parallel to the ground, the calves are parallel to the body, the angle between the body and the ground is 45°, and the knee joints should not exceed the toes.

Exhale, the quadriceps muscles exert force, driving the body back to the starting position. Knee joints are straightened and not locked, and do not deliberately push the hips.

Repeat 8-12 times with a respiration rate of 2-1-4

Note: 1During the squat, the center of gravity is leaning back to limit the dorsiflexion of the foot, and the heel spacer; Knee buckle, it may be that the gluteal minor muscle is unstable and activates the gluteal minor muscle, or the thigh adductor muscle is too tight, relaxing and stretching the thigh adductor muscle; lateral knee pain, relaxation of the tensor fascia lata, iliotibial band; Pain in the upper side of the knee joint, too much tension in the rectus femoris.

2.Hip instability, activation of gluteal minor muscles: clam opening, leaning hip abduction, crab walking.

3.Gluteus maximus activation: gluteal bridge.

Movement Essentials: Feet shoulder-width apart, toes forward, hands on the hips, keep the body centered, pelvis neutral, abdomen tightened, shoulder blades tightened, shoulder straps sinking, keep the chest straight. Step forward about shoulder-width with one leg in the direction of your toes.

Inhale, control the body with quadriceps, bend the hips and knees, squat down to the front knee 90°, the back knee 90°, the body and the ground 90°, the back heel perpendicular to the ground, the front knee should not exceed the toes, and the center of gravity is between the legs.

Exhale, the quadriceps muscles exert force, return to the starting position, and the knee joint is straightened without locking.

Repeat 8-12 times with a respiration rate of 2-1-4

Regarding the description of the femoral quadruple cephalic muscle, the erroneous residual limb is ().

a.It is the anterior thigh muscles.

b.There are four muscles erecting the head to form a tendon.

c.Function: Hip flexion and knee flexion.

d.Function: Hip flexion and knee extension.

e.Innervated by the femoral nerve.

Correct answer: c