Lumbosacral Region of the Spine (Lower Back) The spine is composed of 33 interlocking bones called vertebrae. The
lumbosacral region of the spine consists of 5 lumbar vertebrae and the sacrum
(5 bones joined together). ByHealthwise Staff Primary Medical ReviewerWilliam H. Blahd, Jr., MD, FACEP - Emergency Medicine Specialist Medical ReviewerAdam Husney, MD - Family Medicine Current as ofMarch 21, 2017 Current as of:
March 21, 2017 Author:
Healthwise Staff Medical Review:
William H. Blahd, Jr., MD, FACEP - Emergency Medicine & Adam Husney, MD - Family Medicine
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