LUMBER (LOWER BACK)
The five vertebrae in the lumbar
spine in the lower section of the back and are the largest and most
powerful pieces of the movable portion of the spine. These vertebrae
are separated by cartilage disks for cushioning and are supported by the
powerful musculature and other soft tissue structures of the lower
back. The lumbar spine, like the upper potions of the back, is used for
neurological communications. The largest nerve in the human body, the
sciatic nerve, also begins in the lumbar spine and extends through the
legs and into the feet. This nerve is the reason why lower back
injuries often cause pain that radiates down the legs. The lumbar spine
is important to flexibility and strength and supports much of our
weight.
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