The architecture of the thigh muscles plays an indispensable role that is not only limited to the movement of the legs but also contributes to the movements of the hips. The muscular architecture of thighs can be broadly segregated into three categories 

Classification Of Muscles Present In Thighs

On the broad classification of the thigh muscles, they can be classified into three categories. These are as follows:

• Anterior muscles of thighs help in extending your legs and flexing your thighs.

• Medial muscles help in adducting and rotating your thigh.

• Posterior muscles assist in flexing your leg and extend your thigh.

The Anterior Thigh Muscles

The anterior muscles in the thigh consist of many more types of muscles in its category. These are as follows:

Quadriceps Femoris- It is a type of muscle that consists of four heads that originates from varying locations but they share a similar tendon which is inserted into the patella. The continuing quadriceps tendon stretches through the patella and gets inserted into the tibial tuberosity of the tibia is known as the patellar ligament. It is noteworthy that all four parts of the muscle are innervated by the femoral nerve and they are stretched to the knee. The rectus femoris also flexes the hip.

Muscles That Forms Various Portions Of Quadriceps Group Of Thigh Muscles 

There are four types of muscles that form various portions of the quadriceps group of muscles of the thigh. These are as follows:

• Rectus Femoris

The rectus femoris assists in the formation of the middle portion of the quadriceps. It initiates from the anterior inferior iliac spine and is just above the acetabulum of the hip bone.

• Vastus Lateralis

Vastus lateralis is the lateral-most head of the quadriceps. It initiates from the greater trochanter and linea aspera of the femur. 

• Vastus Medialis

It is the most medial portion of the heads of the quadriceps. It originates from the intertrochanteric line and linea aspera.

• Vastus Intermedius

It lies behind the rectus femoris which originates from the shaft of the femur.

Few Other Muscles Contribution To The Strength Of The Thigh Of The Human Body

Following are a couple of few other muscles that contribute to the strength of the thigh of the human body are:

• Pectineus

Pectineus is a muscle that originates from the superior ramus of the pubis area of the hip bone and inserts within the pectineal line of the femur. It is innervated by the femoral nerve and adducts and assists in thigh flex.

• Sartorius

This muscle originates from the anterior superior iliac spine and inserts on the medial surface of the tibia. It is innervated by the femoral nerve and assists in flexes, abducts, and lateral rotation of the thigh. It also helps in flexing the leg at the knee.

• Iliopsoas

The iliopsoas is made up of two muscles that help in flexing the thigh. One of those muscles, the psoas major which is also important for posture, and the other is Iliacus. 

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