Sartorius Bifurcatus - A Case Report

The sartorius muscle usually arises from the anterior superior iliac spine, crosses the thigh to the medial side and inserts into the proximal part of medial surface of the tibia. An unusual variation of unilateral sartorius muscle was noted in an adult South Indian cadaver during the routine dissection of the lower extremity. The accessory muscle had similar origin from anterior superior iliac spine but descended downward along the lateral side of the main sartorius muscle to get inserted into the medial patellar retinaculum. This mode of insertion gives more stability to the patella by pulling the patella medially by reinforcing the medial patellar retinaculum and thereby preventing the lateral displacement of patella along with the vastus medialis. The branches of femoral artery and the femoral nerve supplied the muscle. The knowledge of variations of sartorius is of paramount importance to utilize it as a graft in reconstructive surgeries.