The low back is centered by the lumbar spine. Although we may not always intuitively think of it as a joint, it actually is a very important group of joints and surrounding muscles. Low back pain is one of the most common conditions around and can be a very painful and debilitating experience.
On his eOrthopod YouTube channel orthopaedic surgeon, Randale C. Sechrest, MD narrates a nice animated tutorial on the anatomy of the cervical spine:
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