The piriformis muscle originates on the anterior surface of the sacrum and it is securely held to it by three tissue attachments found between the first, second, third and fourth anterior sacral foramina. Occasionally, its origin may be so broad that it joins the capsule of the sacroiliac joint with the sacrotuberous and/or sacrospinous ligament. The piriformis muscle is a thick and strong muscle that travels out of the pelvis through the greater sciatic foramen, dividing the foramen into the suprapiriform and infra-piriform foramina. As it courses through the greater sciatic foramen, the muscle decreases to a point where it forms a tendon that attaches to the superior-medial surface of the greater trochanter, frequently integrating with the tendon of the obturator internus and gemelli muscles.
The nerves and blood vessels found within the suprapiriform foramen are known as the superior gluteal nerves and vessels, and those found in the infra-piriforma fossa are known as the inferior gluteal nerves and vessels, including the sciatic nerve. Because of its broad size in the greater sciatic foramen, there’s a risk the numerous vessels and nerves that exit the pelvis may become compressed.
The piriformis muscle is closely associated with other short hip rotators as well, such as the superior gemellus, obturator internus, inferior gemellus and obturator externus. The primary difference between this muscle and other short rotators is its connection to the sciatic nerve. The piriformis muscle passes behind the nerve while the other rotators pass before it.
The piriformis muscle is commonly known among athletes and healthcare professionals as a significant muscle in the posterior hip. This muscle functions to control hip joint rotation and abduction and it is also a distinguishable muscle due to its inversion of action in rotation. Piriformis syndrome is a condition suspected to be a potential source of pain and dysfunction in athletes and the general population. For more information, please feel free to ask Dr. Jimenez or contact us at (915) 850-0900.
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The information herein on "Causes of Piriformis Syndrome and Sciatica" is not intended to replace a one-on-one relationship with a qualified health care professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional.
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Welcome to El Paso's Premier Wellness and Injury Care Clinic blog, where Dr. Alex Jimenez, DC, FNP-C, a board-certified Family Practice Nurse Practitioner (FNP-C) and Chiropractor (DC), presents insights on how our team is dedicated to holistic healing and personalized care. Our practice aligns with evidence-based treatment protocols inspired by integrative medicine principles, similar to those found on dralexjimenez.com, focusing on restoring health naturally for patients of all ages.
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