Editing Sciatica (section)

=== Deep gluteal syndrome ===
{{Main|Deep gluteal syndrome}}
Deep gluteal syndrome is non-discogenic, extrapelvic sciatic [[Nerve compression syndrome|nerve entrapment]] in the deep gluteal space.<ref name=":5" /> Piriformis syndrome was once the traditional model of sciatic nerve entrapment in this anatomic region. The understanding of non-discogenic sciatic nerve entrapment has changed significantly with improved knowledge of posterior hip anatomy, nerve kinematics, and advances in [[Endoscopy|endoscopic]] techniques to explore the sciatic nerve.<ref name=":6" /><ref name=":7">{{cite journal |vauthors=Hernando MF, Cerezal L, Pérez-Carro L, Abascal F, Canga A |date=July 2015 |title=Deep gluteal syndrome: anatomy, imaging, and management of sciatic nerve entrapments in the subgluteal space |url= |journal=Skeletal Radiol |volume=44 |issue=7 |pages=919–34 |doi=10.1007/s00256-015-2124-6 |pmid=25739706}}</ref> There are now many known causes of sciatic nerve entrapment, such as fibrous bands restricting nerve mobility, that are unrelated to the piriformis in the deep gluteal space. Deep gluteal syndrome was created as an improved classification for the many distinct causes of sciatic nerve entrapment in this anatomic region.<ref name=":7" /> Piriformis syndrome is now considered one of many causes of deep gluteal syndrome.<ref name=":6" />