⭐ Piriformis Muscle Anatomy ⭐
Origin: Anterior surface of the sacrum (around the level of S2 to S4), the gluteal surface of the ilium, and the sacrotuberous ligament.
Insertion: Greater trochanter of the femur (medial side of the superior aspect).
Actions: Laterally rotates the thigh at hip joint, abducts thigh at hip joint (when hip is flexed past 60⁰), and stabilises head of femur in acetabulum.
Nerve: Superior gluteal nerve and ventral rami of S1 and S2.
Artery: Superior and inferior gluteal arteries and the internal pudendal artery.

⭐ Can the piriformis contribute to internal rotation?
There is some variation in the piriformis muscle’s body, the tendon and the tendon insertion. Variations in the muscle impact the actions of the muscle. Therefore, although the piriformis muscle has been suggested to be an internal rotator of the hip, the ability to perform this action is dependent on the individual’s own individual anatomical structure. Consequently, the piriformis muscle has been subject to controversy with regards to its muscle actions. The simple answer to if the piriformis is an internal rotator or not is that it actually just depends on the individual person’s anatomy and where their piriformis inserts. In most people, the piriformis has a variation that is going to prevent it assisting in internal rotation of the hip

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Chapters:
0:00 Intro
0:13 Location & overview of the piriformis muscle
1:37 Origin of the piriformis muscle
2:27 Insertion of the piriformis muscle
2:46 Actions of piriformis muscle
4:18 Outro

⭐ Want to learn more about the piriformis? Then check out the full article on the Bodyworks Prime website: https://bodyworksprime.com/piriformis/

⭐If you would like some help memorising the piriformis muscle's information then be sure to check out the free piriformis flashcards: https://bodyworksprime.com/piriformis...

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