The cause of pain of sciatic radiation has long been a subject of investigation, and the causative factors advanced for this condition are legion. My interest was drawn to the role of the sacro-iliac joint in its relation to the components of the sacral plexus by the high incidence in anatomic specimens of hypertrophic arthritic changes with spur formation in the region of the anterior surface of the joint, particularly in the area traversed by the lumbosacral trunk. It is my purpose in this paper to present the anatomy of this region and the data relating to the arthritic changes in the sacro-iliac joint as determined by dissections on 64 cadavers.
The involvement of the lumbosacral trunk by disease of the sacro-iliac joint due to their close anatomic relationship was first demonstrated in 1861 by John Hilton1 in his lectures to the Royal College of Surgeons, at which time
HERSHEY CD. THE SACRO-ILIAC JOINT AND PAIN OF SCIATIC RADIATION. JAMA. 1943;122(15):983–986. doi:10.1001/jama.1943.02840320001001
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