Sacroiliac Joint Anatomy

Phys Med Rehabil Clin N Am. 2021 Nov;32(4):703-724. doi: 10.1016/j.pmr.2021.05.007. Epub 2021 Aug 5.


The sacroiliac joint can be a source of low back pain. This review article summarizes current anatomic evidence of the innervation of the intraarticular and extraarticular parts of the sacroiliac joint relative to bony landmarks identifiable with fluoroscopy and ultrasound. This article aims to provide clinicians with an anatomic basis for clinical application to diagnostic blocks and radiofrequency ablation for sacroiliac pain to optimize clinical outcomes.

Keywords: Anatomy; Blocks; Innervation; Landmarks; Radiofrequency ablation; Sacroiliac joint.

Publication types

  • Review

MeSH terms

  • Arthralgia
  • Fluoroscopy
  • Humans
  • Low Back Pain* / diagnostic imaging
  • Sacroiliac Joint* / diagnostic imaging