this region – the nerve and vessels that emerge superior to the piriformis are the superior gluteal nerve and superior gluteal vessels. Inferiorly, it is the same, and the sciatic nerve also travels inferiorly to the piriformis. History The piriformis muscle was first named by Adriaan van den Spiegel, a professor from the University of Padua in the 16th century. Additional images References External links "Piriformis" University of Washington - "Gluteal Region: Muscles" - "The Female Pelvis: The Posterolateral Pelvic Wall" Hip muscles Hip lateral rotators Deep lateral rotators of the hip Muscles of the lower limb