The three muscles that form the buttocks; including, the gluteus maximus, gluteus medius, and gluteus minimus.

1. The outermost of the three large gluteus muscles that form each buttock in humans.
2. The greatest gluteal muscle and the biggest muscle in the human body.

The gluteus maximus forms most of the buttocks and it acts to extend the upper leg, spread it, and turn it outward.

There are two other gluteal muscles called the gluteus medius and the gluteus minimus. Together with the gluteus maximus, they are the muscles on which we sit.

The middle muscle of the three muscles found in each of the human buttocks which arises from the outer surface of the ilium and which is inserted into the greater trochanter (points at which hip and thigh muscles are attached) of the femur (bone from the hip to the knee).

The innermost muscle of the three muscles found in each of the human buttocks that comes up from the outer surface of the ilium (wide flat upper part of the pelvis) and which is inserted into the greater trochanter (points at which hip and thigh muscles attach) of the femur (thigh bone, extending from the pelvis to the knee).

It is the smallest and deepest gluteal muscle.