Several new developments in the field of neuroimmunology with focus on the brain-to-immune system communication have been the incentive for this PIR volume. It covers topics such as brain-immune interactions, the impact of stress on the immune response, pain and immunosuppression, the modulation of inflammation and pain by the sympathetic nervous system, consequences of nerve injury for the immune system, neuronal mechanisms of immune cell recruitment, and the modulation of the immune response by corticotropin-releasing hormone or adenosine. The authors are a unique group of...