Chiropractic Research

Neural reflexes in inflammation and immunity

The autonomic nervous system primarily regulates organ homeostasis via reflexes that are comprised of afferent and efferent neurons. Specialized afferent neurons initiate the reflex by responding to changes in the environment.

Ulf Andersson1 and Kevin J. Tracey2
1Department of Women’s and Children’s Health, Karolinska University Hospital, Karolinska Institutet, S-171 76 Stockholm, Sweden
2Feinstein Institute for Medical Research, Manhasset, New York 11030

The mammalian immune system and the nervous system coevolved under the influence of infection and sterile injury. Knowledge of homeostatic mechanisms by which the nervous system controls organ function was originally applied to the cardiovascular, gastrointestinal, musculoskeletal, and other body systems. Development of advanced neurophysiological and immunological techniques recently enabled the study of reflex neural circuits that maintain immunological homeostasis, and are essential for health in mammals. Such reflexes are evolutionarily ancient, dating back to invertebrate nematode worms that possess primitive immune and nervous systems. Failure of these reflex mechanisms in mammals contributes to non-resolving inflammation and disease. It is also possible to target these neural pathways using electrical nerve stimulators and pharmacological agents to hasten the resolution of inflammation and provide therapeutic benefit.




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Original article for further reading:

Andersson U, Tracey KJ. Neural reflexes in inflammation and immunity. J Exp Med. 2012;209(6):1057–1068. doi:10.1084/jem.20120571,

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