Final answer:
Psychoneuroimmunology is a field that studies the interplay between psychological factors, the nervous system, and the immune system, especially in the context of stress and its impact on health. It is a multi-disciplinary science encompassing aspects of psychology, neurology, and immunology. Therefore, the correct option is e.
Step-by-step explanation:
The field of study that researches the relationship among the brain, immune system, and psychological factors, specifically with regard to stress-related events, is called psychoneuroimmunology. This interdisciplinary area integrates psychology, neuroscience, and immunology to understand how stress and other psychological factors can affect our immune response and overall health. Psychoneuroimmunology (PNI) emcompasses the bidirectional communication pathways between the nervous and immune systems and explores how psychological factors can lead to changes in immune function which may affect health and disease progression.
For instance, chronic stress is known to inhibit immune responses and increase susceptibility to various diseases. Health psychology, often associated with PNI, investigates the psychological influences on health and illness and devises interventions aiming to foster healthier lifestyles. Psychoneuroimmunology is an ever-growing field with potential for groundbreaking advances in understanding the complex communications between the body's systems.