Psychoneuroimmunology (PNI) is the scientific study of how our thoughts, emotions, and behaviors influence the immune system through interactions with the nervous and endocrine systems. This interdisciplinary field merges psychology, neurology, immunology, and endocrinology.
Why it matters:
It shows that mental health is deeply connected to physical health.
Stress, trauma, and emotions can alter immune responses.
Understanding PNI can help improve treatments for chronic illness and mental health.
Key systems involved:
Nervous system (especially the brain)
Endocrine system (hormones like cortisol)
Immune system (white blood cells, cytokines)
“Emotions are not just in your head — they are in your body too.” – Candace Pert