Correct, these structure areas are some of the most complex within our bodies. There are hundreds of tiny stabilizer muscles in our backs that can be injured. Each disc can have an almost infinite number of ways it can bulge, hemorage or slip. This entire structure is protecting the spinal column and can interfere or damage all kinds of different parts of the body through the nerve connections.

I hypothesize that a majority of depression suffering is sourced by subtle spinal/nerve injuries, which the brain could interpret as death. Once a strong enough signal develops in the brain that's saying, "you're in pain, all the time, you probably should isolate yourself and kill yourself" it's not hard to see how that could lead to depression and suicidal thoughts.

Thank you for pointing this out. I have chronic SI joint problems, and people always think I should be standing. Would not help.