This pain chart is brilliant. It illustrates and explains the internal signals and pain path of someone hammering their finger.
(excerpt from poster)
Pain is an unpleasant sensation resulting from the intricate interplay between sensory and cognitive mechanisms. Chronic pain, resulting from disease or injury, affects nearly every fifth person in the Western world, constituting an enormous burden for the individual and society. Sensitization of pain signalling systems is a key feature of chronic pain and results in normally non-painful stimuli eliciting pain….
Download the Pain Mechanisms pdf