Yes, the dorsal column is extremely important to experiencing an optimal state of health. I had fibromyalgia and chronic fatigue syndrome for almost 7 years. For the first 14 months of my illness, I was bedridden. Towards the end of my illness, I noticed that I had lost a lot of control of my muscle movements and had very little awareness about my bodily posture.
I went to see a chiropractor and he told me that my dorsal column was severely out of alignment. After a series of sometimes very painful alignment treatments over the span of about six months, I have regained control of my muscle movements and am very aware of my posture.
I also make it a point to sit down properly and not lean back on my lower back so much, especially while surfing the Internet or watching TV. It's true, you do not know what you have until it is gone, and now that I know how important my dorsal column is, I do my best to respect it and make sure that I sit properly and get follow-up alignment treatments, when necessary.