How can the qi deficiency described in the Donguibogam be understood through modern medicine? It corresponds closely with the early stages of cognitive decline and the brain fog that often accompanies chronic fatigue syndrome. The brain consumes an immense amount of energy. In particular, the frontal lobe, which oversees executive function such as concentrating, planning, and problem-solving, is the first to lose efficiency when energy reserves fall.
In the Donguibogam, qi can be seen as an overarching concept covering cellular activity, neurotransmitter production, and energy metabolism. A state of qi deficiency parallels conditions where cellular energy generation, such as adenosine triphosphate (ATP) production, drops, or an imbalance in brain neurotransmitters occurs. For example, when the release of dopamine, which regulates focus and motivation, or acetylcholine, which supports learning and memory, becomes sluggish, the mind can feel clouded by fog regardless of effort. Information processing slows, making it harder to absorb new information or draw upon existing knowledge, much like an engine struggling when it lacks fuel.
Qi deficiency is also tied to chronic stress. Persistent stress raises levels of the stress hormone cortisol, which can damage regions that support memory and cognitive function, including the hippocampus and frontal lobe. Chronic stress triggers neuroinflammation and limits neuroplasticity, reducing the flexibility of neural pathways. Over time, this leads to impaired concentration, memory impairment, and diminished learning capacity. The Donguibogam's observation that an insufficiency of qi leaves the spirit uneasy and the mind unable to remain focused reflects these multifaceted disruptions within the neuroendocrine system.
Irregular sleep schedules, excessive screen time, and nutritional imbalance further accelerate this cognitive decline. Constant exposure to digital screens trains the brain toward frequent attentional shifting, weakening the capacity for sustained, deep focus. This overburdens the reward system and dulls the sensitivity of dopamine receptors, creating a cycle where stronger stimulation is required to achieve focus. When the body's baseline energy is already low, brain efficiency drops even further. The concept of qi deficiency offers a functional explanation for neurological and endocrine imbalances related to modern habits, framing these symptoms not as a flaw in character, but as a physiological imbalance that can be restored.
