Startled by Small Sounds: Why Highly Sensitive People Should Care for Their Gallbladder Health First

The gallbladder functions described in Donguibogam can be interpreted even more intriguingly through the lens of modern neuroscience and endocrinology. Startling easily at small sounds or reacting hypersensitively to external stimuli is deeply related to the brain's amygdala. The amygdala can be described as our brain's safety alarm system that detects threats and processes emotions such as fear and anxiety. Under ordinary conditions, it reacts only to appropriate stimuli, but if this amygdala becomes hyperactivated or poorly controlled, one reacts with excessive sensitivity even to minor triggers. Furthermore, this hypersensitivity reaction is closely connected to an autonomic nervous system imbalance. Our body contains sympathetic nerves that manage excitement and tension, and parasympathetic nerves that govern rest and relaxation; however, modern stress-filled lifestyles tend to excessively activate the sympathetic nerves. When sympathetic nerves remain on constant high alert and become dominant, the fight-or-flight response, where the heart beats rapidly, breathing accelerates, and muscles tense at small stimuli, readily occurs. This directly aligns with a weakened gallbladder being unable to cope properly with external threats and startling easily. Chronic stress also disrupts the balance of neurotransmitters in the brain and can induce inflammatory responses. In particular, a deficiency in calming neurotransmitters like serotonin and GABA can further deepen anxiety and hypersensitivity. The prefrontal cortex of the brain regulates excessive responses from the amygdala; when prefrontal cortex function declines due to stress or sleep deprivation, emotional regulation becomes harder, making one easily startled or sensitive to small stimuli. If this state persists, bodily fatigue ultimately increases and immunity drops, leaving one suffering from chronic anxiety and fatigue. The ancient saying that 'when the gallbladder is deficient, one fears easily' presents a remarkable insight that can be interpreted in modern medicine through the brain's emotional regulation center, autonomic nervous system imbalance, and neuroinflammatory responses.