Where does the piriformis originate?

Where does the piriformis originate?

• A. Coccygeus
• B. Sacrum
• C. Ilium
• D. Pubis

Answer: (B)

The piriformis originates from the anterior surface of the sacrum (often around S2–S4) and from the attached sacrotuberous ligament. This origin places the muscle on the pelvic wall and explains its course laterally through the greater sciatic foramen to insert on the superior border of the greater trochanter. The coccygeus attaches to the ischial spine and coccyx, while the ilium and pubis serve as origins or insertions for other hip and pelvic muscles, not for the piriformis.

The piriformis originates from the anterior surface of the sacrum (often around S2–S4) and from the attached sacrotuberous ligament. This origin places the muscle on the pelvic wall and explains its course laterally through the greater sciatic foramen to insert on the superior border of the greater trochanter. The coccygeus attaches to the ischial spine and coccyx, while the ilium and pubis serve as origins or insertions for other hip and pelvic muscles, not for the piriformis.