The role of brain reward pathways in stress resilience and health

• Published in: Neuroscience and biobehavioral reviews 2018-12, Vol.95, p.559-567
• Main Authors: Dutcher, Janine M., Creswell, J. David
• Format: Article
• Language: English
• Subjects: Animals; Brain - diagnostic imaging; Brain - physiology; Brain - physiopathology; Health outcomes; Humans; Mental Disorders - diagnostic imaging; Mental Disorders - physiopathology; Neural Pathways - diagnostic imaging; Neural Pathways - physiology; Neural Pathways - physiopathology; Resilience; Resilience, Psychological; Reward; Stress; Stress, Psychological - diagnostic imaging; Stress, Psychological - physiopathology
• ISSN: 0149-7634; 1873-7528
• DOI: 10.1016/j.neubiorev.2018.10.014

•Rewarding stimuli can mitigate subsequent stress responses.•This effect occurs via connections between the brain’s reward and stress systems.•Initial work suggests that rewarding stimuli also have important health benefits.•It is possible that dampened stress reactivity is one mechanism for these benefits.•Future work should explore this reward-stress buffering effect on health. While it is well established that stress can increase risk for a broad range of health and disease outcomes (e.g., major depression, cardiovascular disease), less is known about factors supporting resilience. An emerging literature indicates that activation of the brain’s reward system can mitigate subsequent stress responses to a broad range of stressors in animals and humans, suggesting reward pathways as a novel mechanistic target for fostering resilience under stress. This perspective will: 1) describe the emerging evidence linking primary and secondary rewards with stress buffering effects; 2) identify plausible neurobiological mechanisms; and 3) introduce new links between brain reward activation and reduced stress-related health and disease outcomes. We conclude with a discussion of research opportunities and clinical implications of brain reward effects.