Endogenous Opioids

Introduction to the volume: The Journey Ahead. - The Foundational Science of Endogenous Opioids and Their Receptors. - Interactions Between Endogenous Opioids and the Immune system. - The Opioid Growth Factor in Growth Regulation and Immune Responses in Cancer. - Role of Endorphins in Breast Cancer Pathogenesis and Recovery. - Modulatory Processes in Craniofacial Pain States. - Enkephalin Rescues Temporomandibular Joint Pain Related Behavior in Rats. - Endogenous Opioids and Exercise-Related Hypoalgesia: Modern Models, Measurement, and Mechanisms of Action. - Pain, Fear, Anxiety, and Stress: Relation to the Endogenous Opioid System. - The Roles of Endogenous Opioids in Placebo and Nocebo Effects: From Pain to Performance to Prozac. - Physical Exercise as an Intervention for Depression: Evidence for Efficacy and Mu-Opioid Receptors as a Mechanism of Action. - The Endogenous Opioid System as a Pathway of Positive Emotions. - Endogenous Opioids and Volunteering: On the Evolutionary Significance ofHelping Others. - Endogenous and Exogenous Opioids: Role in Substance Use Disorders. - Endogenous Opioid Activity as the Mechanism of Action for Mitragyna Speciosa (Kratom): The Current State of the Evidence. - Endogenous Opioids in the Homeostatic Regulation of Hunger, Satiety, and Hedonic Eating: Neurobiological Foundations. - Role of Endogenous Opioids in the Pathophysiology of Obesity and Eating Disorders. - Integration of Endogenous Opioid System Research in the Interprofessional Diagnosis and Treatment of Obesity and Eating Disorders. - The Role of Endogenous Opioids in Cardioprotection. - Endorphins, Sexuality, and Reproduction. - Depression, Cancer, Inflammation, and Endogenous Opioids: Pathogenic Relationships and Therapeutic Options.