Which muscle forms the medial border of the femoral triangle?

The muscle that forms the medial border of the femoral triangle is the Adductor Longus Muscle. This triangle is an anatomical area located in the upper thigh and serves as a significant transit point for various neurovascular structures. The boundaries of the femoral triangle are defined by three key muscles: the sartorius muscle forms the lateral border, the adductor longus muscle constitutes the medial border, and the inguinal ligament serves as the superior border.

The adductor longus muscle, being situated more medially, plays a vital role in this region as it assists in the adduction of the thigh. Its position is important because it also helps in delineating the space through which major vessels, such as the femoral artery and vein, pass. Understanding the anatomy of the femoral triangle is crucial for clinical assessments and surgical interventions in the lower limb.