PIRIFORMIS
https://www.body-n-muscles.com/2016/11/piriformis.html
Piriformis muscle
Origin of Piriformis
Anterior surface of lateral process of sacrum and gluteal surface of ilium at the margin of the greater sciatic notch.Insertion of Piriformis
Superior border of greater trochanter.Muscle Action/Function of Piriformis
Lateral rotator of the hip joint; also helps abduct the hip if it is flexed.Arterial (Blood) Supply of Piriformis
Superior and inferior gluteal and internal pudendal arteries.Piriformis Video
Piriformis - Muscles of the Hip and ThighHip Extension
Aids a little bit.