Which action is performed by the superficial gluteal muscle?

• A. Abduct the hip
• B. Extend the stifle
• C. Flex the hip
• D. Rotate the femur laterally

Answer: (A)

The action performed by the superficial gluteal muscle is to abduct the hip. This muscle is primarily responsible for moving the leg away from the midline of the body, which is the definition of abduction. It plays a crucial role in stabilizing the pelvis during locomotion as well, helping to maintain balance and posture while walking or running.

In terms of anatomy, the superficial gluteal muscle originates from the sacrum and the cranial part of the ilium and inserts on the third trochanter of the femur. When it contracts, it pulls the femur laterally, facilitating the abduction movement.

Other choices, such as extending the stifle or flexing the hip, do not apply to the superficial gluteal muscle as they involve different muscles or muscle groups that are specifically designed for those actions. The rotation of the femur laterally, while relevant to other muscles in the gluteal group, does not accurately describe the primary action of the superficial gluteal muscle. Therefore, understanding the anatomical position and function of the superficial gluteal muscle underlines its role in hip abduction.