Cool it- you don't seem to know much about the nervous system at all.
We are gradually getting to know more about pain, and attentional mechanisms are very important in mediating pain sensation. Take a look at this paper for a review paper about pain sensitization, the phenomenon I was talking about:
http://www.sciencedirect.com/science/article/pii/S0304395910005841
NN
I have read my share of Woolf review papers
He has been writing the same stuff for years siting on his fat harvard chair, doing no research.
Look at the actual research papers, not the review papers and then think.
It is clear that no one really knows how chronic pain develops and maintains itself. The system is so complex and so full of opportunities for feedback effects that almost certainly there will be different types of molecular mechanisms underlying different types of pathologies
Separating the nervous system into PNS and CNS is an anatomical simplification from the past which has outlived its usefulness beyond the introductory level, when you think at the molecular level and understand that the nervous system is fully bidirectional and acts as a loop (or several loops). It is not about a PNS nerve ending in say your skin, sending an electrical impulse up to brain neurons via the dorsal horn, as u know
Intra cellular signalling (both molecular and 'electrical') in neurons is bidirectional. What goes on in the dorsal horn end of a PNS neuron can change the activity of the other end of the PNS neuron that terminates in a muscle, organ etc, and what goes on in that dorsal horn end depends on what is coming down from the brain, which depends on what is coming up to the brain from the dorsal horn etc etc
the problem is that there is no way to currently understand the system as a whole. nobody even knows how long term potentiation between 2 neurons is maintained
anyway now that i wrote this shit i am wondering i did i bother