The sensation of pain occurs when neural pathways conduct excitation generated by tissue damage to the spinal cord, where the nociceptive information is extensively pre-processed. From there, the information is transmitted to the human brain, where the sensation of "pain" is finally created. This is the general belief. However, researchers have now discovered that pain is not just a matter of nerves but that non-neuronal cells, the glial cells, are also involved in clinically relevant pain models and their activation is sufficient to amplify pain.
from Diet and Weight Loss News -- ScienceDaily https://www.sciencedaily.com/releases/2016/11/161110145702.htm
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