Educational only — not medical advice. This page explains a published mechanism of a medical condition for general education. It is not a diagnosis, not a treatment plan, and not a substitute for evaluation by a qualified clinician.
Piriformis Syndrome: Why Your Sciatica Might Not Be a Disc
A 54-second narrated mechanism animation on piriformis syndrome, with the full transcript and the peer-reviewed references behind every claim — so you can check what the science actually says.
Transcript
What the video says, beat by beat
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Your sciatica might not be a disc
“Pain in the buttock that shoots down the leg usually gets blamed on a slipped disc. Sometimes the culprit is a muscle.”[1]
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Meet the piriformis
“Deep in the buttock sits the piriformis, a small hip-rotator. The sciatic nerve runs just beneath it — in some, right through.”[3]
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When the muscle squeezes the nerve
“When that muscle tightens or spasms, it can squeeze the sciatic nerve. Pain specialists call this deep gluteal syndrome.”[2]
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It mimics a slipped disc
“A pinched nerve feels identical, here or in the spine. The back MRI looks normal — the real cause gets missed.”[1,6]
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What the evidence targets
“The studied options target the muscle, not the spine: stretching and physical therapy first, then image-guided injections if needed.”[4,7]
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Two red flags
“Two signs change the rules: worsening leg weakness, or any change in bladder or bowel control. Those need urgent evaluation.”[8]
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Get the right diagnosis
“Piriformis syndrome is real and diagnosable — telling it apart from the spine takes a specialist. Educational only, not medical advice.”[5,6]
What the science says
References
According to PubMed: every reference below was re-verified against its live PubMed record on August 20, 2026. Numeric findings from individual studies are attributed to those studies and are not promises of results.
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Parziale JR, Hudgins TH, Fishman LM. The piriformis syndrome. Am J Orthop (Belle Mead NJ). 1996;25(12):819-823.
Covers: prevalence among sciatica patients · clinical definition · misdiagnosis
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Martin HD, Reddy M, Gómez-Hoyos J. Deep gluteal syndrome. J Hip Preserv Surg. 2015;2(2):99-107.
Covers: deep gluteal syndrome definition · posterior hip anatomy · differential diagnosis
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Natsis K, Totlis T, Konstantinidis GA, Paraskevas G, Piagkou M, Koebke J. Anatomical variations between the sciatic nerve and the piriformis muscle: a contribution to surgical anatomy in piriformis syndrome. Surg Radiol Anat. 2014;36(3):273-280.
Covers: anatomy / entrapment variants (294 cadaveric limbs, Beaton & Anson classification)
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Fishman LM, Dombi GW, Michaelsen C, Ringel S, Rozbruch J, Rosner B, Weber C. Piriformis syndrome: diagnosis, treatment, and outcome — a 10-year study. Arch Phys Med Rehabil. 2002;83(3):295-301.
Covers: diagnostic approach (FAIR test) · conservative treatment (injection + PT) outcomes
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Hopayian K, Song F, Riera R, Sambandan S. The clinical features of the piriformis syndrome: a systematic review. Eur Spine J. 2010;19(12):2095-2109.
Covers: diagnostic approach · symptom pattern · prevalence uncertainty
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Kirschner JS, Foye PM, Cole JL. Piriformis syndrome, diagnosis and treatment. Muscle Nerve. 2009;40(1):10-18.
Covers: diagnosis of exclusion · full conservative-treatment ladder
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Fishman LM, Anderson C, Rosner B. BOTOX and physical therapy in the treatment of piriformis syndrome. Am J Phys Med Rehabil. 2002;81(12):936-942.
Covers: conservative treatment evidence (botulinum toxin injection as PT adjunct)
PubMed · PMID 12447093 · DOI · 10.1097/00002060-200212000-00009
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Fraser S, Roberts L, Murphy E. Cauda equina syndrome: a literature review of its definition and clinical presentation. Arch Phys Med Rehabil. 2009;90(11):1964-1968.
Covers: red-flag symptoms (transcript shot 6 — outside the five core topic areas, hence supplementary)