Conditions & Treatments - Piriformis Syndrome
syndrome (click here for article for patients) is described as a peripheral neuritis of the sciatic nerve
attributed to an abnormal condition of the piriformis muscle (1). Often
times, it may not be diagnosed properly and may pose itself as another
condition with similar symptoms such as lumbosacral radiculopathies,
degenerative disc disease, compression fractures, spinal stenosis,
sacroilitis, sacral iliac dysfunction, or diseases of the hip (1). The
primary function of the piriformis muscle is to perform hip external
rotation and assist with hip abduction when the hip is flexed. It originates
at the anterior surface of the lateral sacrum and inserts at the greater
trochanter of the femur, along its upper medial surface. The sciatic nerve
enters the buttock adjacent to the piriformis muscle (2). Pirifromis
syndrome involves compression of the sciatic nerve by the piriformis muscle
resulting in sciatica (1, 2, 3).
Last revised: September 24, 2013
by Chai Rasavong, MPT, MBA
1) Boyajian-O'Neill LA, et al. Diagnosis and Management of Piriformis Syndrome: An Osteopathic Approach. JAOA. 2008 Nov;108(11):657-664.
2) Fishman LM, et al. Piriformis Syndrome: Diagnosis, Treatment, and Outcome - a 10-Year Study. Arch Phys Med Rehabil. 2002 March;83:295-301.
3) Hopayian K, et al. The Clinical Features of Piriformis Syndrome: A Systematic Review. Eur Spine. 2010 19:2095-2109.