Couple links for you, if you're interested, about how pinched nerves can lead to degradation of electrical message transmission:
link1
"If the nerve gets ?pinched? the flow up and down the inside of the hose is reduced or blocked and the nutrients stop flowing. Eventually the membrane starts to loose its healthy ability to transmit the tiny electrical charges and the nerve fiber may eve eventually die. When enough fibers stop working, the skin may feel numbness or a muscle may not contract."
...or organs inside your body may not function properly, since they also require proper nerve functionality.
Sounds valid to me. Can't have impulses if the ions can't flow and distribute through the axon...didnt put that completely together in my mind when I made my previous statement.
link2
"Subluxations usually result in Nerve Interference, commonly known as a "pinched" nerve. Nerve interference creates an environment of imbalance and disease within the human body. This means that the nervous system is unable to properly perform it's job of transmitting messages from the brain and spinal cord to the rest of the body. This results in cells not getting the amount of oxygen they need to work properly; ultimately causing various health problems."
But now it begins to push it. An "environment" of imbalance is far too wishy washy for any serious doctor or someone with even a shred of scientific inclination to take seriously. Certain nerves get pinched, they lose their effectiveness (vast oversimplification, again), although this is usually a one way street - nerves dont regenerate all too well...but I can at least stomach the concept. Certain spinal nerves route to certain parts of your body, so a pinched nerve here or there is unlikely to effect your entire body. Your spinal cord primarily carries motor nerves, and sympathetic/parasympathetic signals, it doesnt nearly control the entire body as described.
Think about christopher reeve - he broke his back, and was paralyzed. He wasn't "diseased" so to speak, for a long time. Motor neurons gone. I doubt he had much of an ANS after that, but when you're in a wheelchair, you dont quite need it as much. The rest of your body functions either on its own or primarily integrated by the brain.
Cells not getting enough oxygen? I doubt that. Unless it somehow causes your lungs to collapse, your heart to stop beating (which beats completely on its own, independent of the CNS, which only affects its rate), and all your blood vessels to atrophy. Highly unlikely to my knowledge.
So ultimately, I'm left with the impression that there are a few valid instances where the actual "adjustments" made can be beneficial. If a *pinched nerve* is the problem. If you have an infection, its VERY UNLIKELY its due to a pinched nerve that is playing tricks with your ANS screwing with your immune response. You could have back/bone/joint pain for various reasons, pinched nerve being only one of them.
If chiropractors went to lengths to scientifically validate how the pinched nerves lead to *specific* problems, and limited their practice to those situations where they were actually effective, I'm sure they would be a respected medical speciality. But claiming they can cure infections, and solve all your back problems just reeks of quackery, and the medical community has to throw the baby out with the bathwater when dealing with them.
Wikipedia had an interesting take on it. I found this most revealing.
There is evidence that spinal manipulation is effective for the treatment of acute low back pain, tension headaches and some musculoskeletal issues, but not all studies support this conclusion.[5][6] There are no objective controlled trials with definitive conclusions for or against chiropractic claims concerning other health benefits.
Which tells me exactly what I'm thinking. Some problems they can fix, some they cant. They claim to fix all of them, and rather than go to lengths to validate it, they just turn the blind eye, and think that ignorance is bliss.
I'm all ears to hear otherwise, but to me, it sounds 10% valid, 90% absurd.