How do classical concepts like qi stagnation and the transportation and transformation of the spleen and stomach translate into modern science? They correspond closely with the gut-brain axis. This axis is a bidirectional communication network through which the brain and the gut continuously send signals back and forth. The brain functions as a central control tower, while the gut carries out commands and reports its condition back to the nervous system.
A primary pathway in this network is the vagus nerve. Originating in the brain, the vagus nerve reaches various organs including the heart, lungs, and stomach, playing a central role in the autonomic nervous system. Under stress, the sympathetic nerve becomes dominant and triggers a fight-or-flight response, which temporarily deprioritizes digestive activity or causes erratic digestive contractions. Chronic stress leads to vagus nerve dysfunction, disturbing intestinal peristalsis and negatively affecting digestive enzyme secretion and the gut environment. What classical medicine calls qi stagnation mirrors this modern understanding of intestinal motility issues stemming from an autonomic nervous system imbalance, also known as a functional gastrointestinal disorder.
The gut microbiota also plays a critical role in the gut-brain axis. These microorganisms assist with digestion, contribute to the production of neurotransmitters like serotonin and GABA, and support immunomodulation. Ongoing stress, irregular meal schedules, and heavily processed diets upset the balance between beneficial gut bacteria and harmful bacteria, leading to gut dysbiosis. This imbalance increases intestinal mucosal permeability, promotes inflammation, creates excess gas, and heightens visceral hypersensitivity. Visceral hypersensitivity causes a person to experience normal intestinal sensations as acute pain or discomfort, which is a major factor behind the persistent cramps and distress in irritable bowel syndrome.
In addition, stress hormones such as cortisol alter intestinal peristalsis, raise intestinal mucosal permeability, and influence immune responses that trigger inflammation. The Donguibogam observation that stagnant liver qi impairs the spleen and stomach aligns with how modern medicine describes stress-related neurochemical changes disrupting gut performance. Ultimately, irritable bowel syndrome is not an isolated digestive flaw, but the result of a broader interaction among the brain, the digestive tract, and the gut microbiota. Supporting your gut health is a fundamental step toward caring for your entire body and mind.
