Which muscle is located at the lateral border of the femoral triangle?

The Sartorius muscle is indeed located at the lateral border of the femoral triangle. This triangle is an anatomical space formed by important structures in the groin area. The sartorius is a long, thin muscle that runs diagonally across the thigh from the anterior superior iliac spine (ASIS) down to the medial aspect of the knee.

In the context of the femoral triangle, which also includes the inguinal ligament as its superior border, the adductor longus forms the medial boundary, while the psoas major and iliacus muscles contribute to the deeper structures of the femoral triangle. The tensor fasciae latae, while significant in hip function, is not part of the femoral triangle and is located more laterally in the hip region. The sartorius's position and role in hip flexion and knee flexion make it an essential muscle to identify when discussing the borders and contents of the femoral triangle. Understanding these anatomical relationships enhances one's knowledge of lower limb anatomy and pedestrian biomechanics.