What is the primary function of the tensor fascia latae muscle?

The primary function of the tensor fascia latae muscle is to flex the hip and stabilize the pelvis. This muscle plays a crucial role in coordinating movements of the hip joint during activities such as walking, running, and climbing. It is located on the lateral side of the thigh and contributes to the stability of the pelvis when the lower limb is in motion. By assisting in hip flexion, it helps to control the position of the pelvis, promoting efficient movement patterns.

In contrast, the other options pertain to functions that are not associated with the tensor fascia latae. Extending the stifle refers to knee joint action, which is primarily performed by the quadriceps muscle group. Flexing the elbow relates to the action of muscles in the upper limb, such as the biceps brachii. Lastly, extending the tarsus is a function that involves muscles of the lower leg responsible for movements at the ankle, such as the extensor digitorum longus.