Which gluteus muscle is responsible for the movement of the hip?

The gluteus maximus muscle is the largest and most superficial of the gluteal muscles, making it the most prominent muscle responsible for the movement of the hip. Its primary functions include extension, outward rotation, and abduction of the hip joint. These movements are critical in various activities such as standing up from a seated position, climbing stairs, and running.

The gluteus maximus provides significant strength and stability to the hip and pelvis, which is essential for maintaining balance and proper posture during dynamic movements. While the other gluteal muscles, such as the gluteus medius and gluteus minimus, also contribute to hip movement, they primarily assist in stabilization and smaller movements rather than the powerful extension provided by the gluteus maximus. The term "gluteus tergius" is not a recognized muscle, which further highlights why gluteus maximus is the correct answer in this context.