Final answer:
The tensor fasciae latae acts as a stabilizer of the hip joint, working with other muscles to flex and abduct the thigh and stabilize the pelvic girdle, particularly through its connection to the iliotibial tract. D. Quadratus femoris
Step-by-step explanation:
The student has asked: Which of the following acts as a stabilizer of the hip joint?
The hip joint is a vital structure that connects the pelvic girdle to the lower limb and is supported by numerous muscles that aid in its stabilization and movement. The choices given are A. Tensor fasciae latae, B. Obturator internus, C. Piriformis, and D. Quadratus femoris. Although all these muscles play a role in the movement and stability of the hip, the tensor fasciae latae is particularly noteworthy for its role in stabilizing the hip joint.
The tensor fasciae latae is a muscle of the thigh that works alongside the iliopsoas and gluteus medius to flex and abduct the thigh. Furthermore, it assists in stabilizing the knee through its connection to the iliotibial tract. Unlike the other muscles listed, which primarily act as lateral rotators of the thigh at the hip, the tensor fasciae latae also directly contributes to the stabilization of the pelvic girdle, supporting the hip joint during various activities.
The gluteus maximus, gluteus medius, and gluteus minimus are the major contributors to the extension and abduction of the femur, which are important actions for stabilizing the hip joint. However, among the options provided, the tensor fasciae latae is the muscle that has a direct role in stabilizing the hip, making it the best answer to the student's question.