Muscle in the thigh also known as muscle?

The muscle in the thigh commonly referred to as the "quad" is the quadriceps femoris. It consists of four muscles: vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris. Together, these muscles work to extend the knee joint and are critical for various movements such as walking, running, squatting, and jumping. Additionally, the quadriceps play an essential role in maintaining knee stability and protecting the joint from injury.