Which of the following muscles attaches to the pes anserinus?

The muscle that attaches to the pes anserinus is indeed the sartorius. The pes anserinus, meaning "goose's foot," is the conjoined tendon on the medial aspect of the tibia, where three muscles attach: the sartorius, gracilis, and semitendinosus.

The sartorius muscle runs from the anterior superior iliac spine (ASIS) to the pes anserinus, where it contributes to the flexion, abduction, and lateral rotation of the hip, as well as flexion of the knee. This makes its attachment at the pes anserinus significant for knee and hip movement.

The biceps femoris, vastus intermedius, and tensor fasciae latae do not attach to the pes anserinus, focusing instead on different functions and areas around the hip and knee. The biceps femoris is part of the hamstring group that primarily works on knee flexion and extends the hip joint, rather than inserting on the tibia in the area of the pes anserinus. The vastus intermedius is one of the quadriceps muscles that attaches to the patellar tendon and is involved in knee extension. The tensor fasciae latae contributes to the stabilization of