a tendon
The piriformis originates at the anterior sacrum and inserts at the greater trochanter of the femur.
Piriformis-- A muscle in the pelvic girdle that is closely associated with the sciatic nerve.
The piriformis rotates the thigh laterally. When the hip is flexed greater than 90 degrees it then it rotates the thigh medially.
The heart.
Piriformis
The condition is caused by the irritation or compression of the proximal sciatic nerve by the piriformis muscle, which connects the sciatic notch with the greater trochanter of the femur
Glute medius
Piriformis
M. Piriformis
orthopedic surgeon
the sarcum, the coccyx and the piriformis muscle