David Felton, MD, Ph.D is Professor of neurobiology and Anatomy at the University of Rochester School of Medicine. He and his wife, Suzanne Felton, Ph.D, have discovered nerve fibers that physically link the nervous system and the immune system. Dr. Felton was the recipient of a MacArthur Foundation prize Fellowship in 1983 and is associated of the journal brain, behavior and immunity.

What you see below is taken from the book Healing and the Mind.

Dr. Felton States that by finding nerve fibers running through the spleen it suggest that the nerves might influence the immune system. This is something that we see in practice every day at Snyder Family Chiropractic when reducing stress on the neuro spinal systems people receiving care get sick less frequently.