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Sacroiliac joint innervation and pain
J D Fortin1, R O Kissling, B L O'Connor
1Spine Technology and Rehabilitation, PC, Fort Wayne, Indiana, USA.
American Journal of Orthopedics (Belle Mead, N.J.)
|December 30, 1999
Summary
The human sacroiliac joint (SIJ) is primarily innervated by sacral dorsal rami. This finding aligns with pain referral patterns and treatment outcomes for SIJ pain.
Area of Science:
- Anatomy
- Neuroscience
- Pain Medicine
Background:
- The innervation of the sacroiliac joint (SIJ) is not fully understood.
- Previous studies have yielded conflicting results regarding the nerves supplying the SIJ.
Purpose of the Study:
- To review current knowledge on SIJ innervation.
- To present findings from a new anatomical study on SIJ innervation.
- To correlate anatomical findings with clinical observations of SIJ pain.
Main Methods:
- Review of existing literature on SIJ innervation.
- Anatomical dissection of adult human cadavers.
- Fetal correlation study.
- Analysis of referred pain patterns in volunteers.
- Review of outcomes from anesthetic injections for SIJ pain.
Main Results:
- The SIJ is predominantly innervated by sacral dorsal rami.
- This innervation pattern is consistent with reported referred pain areas.
- Anesthetic injections into the SIJ have shown efficacy in pain reduction.
- Preliminary data indicate the presence of mechanoreceptors and nociceptors in SIJ periarticular tissues.
Conclusions:
- Sacral dorsal rami are the primary source of innervation for the human SIJ.
- The identified innervation pattern supports the role of the SIJ in pain perception.
- The SIJ contains sensory receptors crucial for proprioception and pain signaling.