Your back problem is a also a brain problem:

As a chiropractor we deal with the brain in a very unique way. With the chiropractic adjustment we affect the brain by improving the mechanics of the body. Movement runs your brain. In fact 90 percent of the nutrition the brain uses to run the body is from movement; more specifically movement of the spine. When the spine is aligned properly and not dysfunctional this stimulates positive information going to the brain, which will in turn give you positive information leaving the brain. This has a positive affect on the body’s ability to adapt to its surroundings.