The vagus nerve and enteric nervous system form a direct anatomical communication channel between the gastrointestinal tract and the central nervous system, establishing what researchers term the gut-brain axis. This bidirectional pathway allows microbial signals to reach the brain in real time, influencing neurotransmitter production, stress hormone regulation, and immune function. Beyond direct neural signalling, gut bacteria produce short-chain fatty acids and other metabolites that cross the blood-brain barrier, modulating gene expression and epigenetic processes. Recent neuroscience literature reveals that this integrated communication system operates through synergistic neural, endocrine, immune, and metabolic mechanisms. Disruption in this axis has been implicated in various psychiatric and neurological conditions, suggesting that understanding these mechanisms may revolutionize the treatment of mood and cognitive disorders. Read the full article on GMJ Newsroom.
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