Journal of Advanced Clinical Neurology Research

Abstract

Meditation is an evidence-based mind–body intervention that exerts profound effects on physical, mental, and emotional health through complex neurobiological, biochemical, and physiological mechanisms. Over the past three decades, advances in neuroimaging, molecular biology, and psychophysiology have enabled a deeper understanding of how meditation modulates brain function, autonomic balance, endocrine regulation, immune responses, and cellular ageing processes. Meditation has been shown to reduce stress, enhance emotional regulation, improve cardiovascular health, optimise metabolic function, and strengthen immune resilience. These effects are mediated through mechanisms including neuroplasticity, hypothalamic–pituitary adrenal (HPA) axis modulation, reduction of systemic inflammation, and regulation of neurotransmitters such as serotonin, dopamine, and gamma-aminobutyric acid (GABA). Furthermore, meditation influences gene expression related to stress response, mitochondrial function, and cellular repair, suggesting a role in slowing biological ageing. Clinically, meditation has demonstrated benefits across a wide spectrum of diseases including hypertension, coronary artery disease, depression, anxiety disorders, chronic pain syndromes, diabetes, and irritable bowel syndrome. This article provides a comprehensive scientific review of meditation, focusing on its mechanisms of action, organ-specific effects, and therapeutic applications, and highlights its role as a cornerstone of integrative medicine.