I took an IQ test once, in middle school, and I still remember the moment because my teacher and classmates were surprised at how low my score was. As I recall it was in the low 100s — even allowing for how carelessly I did it, well below the class average. That small episode is a good way into how Korean Traditional Medicine (KTM) thinks about the brain, intelligence and constitution.
In Summary
- KTM classes the brain as an “extraordinary fu organ” (기항지부, 奇恒之腑) — not an independent, self-directing organ, but one that serves.
- KTM explains the brain’s physiology and pathology mainly through the kidney and spleen — echoing modern links between brain disease and gut and metabolic health.
- The brain is best seen as a messenger carrying out what the mind and the five zang organs need and command.
- Intelligence tracks physical age and capacity, but its root lies in the mind, thought and the state of the organs; motivation and crisis can lift it dramatically.
- Rather than seeing limits in your brain, see characteristics — and since the brain follows the organs, those characteristics come partly from your constitution.
The Test I Didn’t Care About
While taking that test, I remember thinking:
- Doing well on this won’t make me any smarter.
- It doesn’t count toward my grades.
- I have no wish to look clever to other people.
- I’d rather spend this concentration on more maths problems.
- I’ll do just enough not to be labelled a careless student.
I don’t know exactly why I thought that way, but I suspect it came from my nature — my constitution.
The Brain in KTM: An Organ That Serves
People have long wondered whether something special in a genius’s brain explains the genius. Einstein’s brain was preserved and studied after his death, and the differences researchers reported were modest and remain debated — nothing that clearly accounts for what he achieved.
In KTM, the brain is classed as an extraordinary fu organ (기항지부, 奇恒之腑): an organ of a special kind that does not act on its own initiative but plays a receptive, serving role. So when KTM discusses the brain’s physiology and pathology, it mainly connects the brain to other organs, especially the kidney and the spleen. That is broadly in tune with modern medicine’s growing recognition that brain disorders are closely tied to the gut and to metabolic disease.
That is why I started with my own story. I think the most reasonable view is that the brain is a messenger that carries out its work according to the needs and commands of the mind and the five zang organs. Had the wish to do well on that IQ test come from my mind and my organs — had I decided, “this test matters to me” — I suspect I would have scored well above 100.
Where Intelligence Comes From
Intelligence does track physical age and capacity. But its root lies in the mind, in thought, and in the state of the five zang organs. There are many cases of people whose intellectual performance leapt even in later life, because a crisis or a new kind of motivation changed what they were reaching for.
So rather than seeing limits in your brain, I think it is more accurate to see characteristics. And because the brain follows the organs’ lead, its characteristics come in part from your constitution — a tendency, not a fixed ceiling.
Anyone can become great, but not everyone becomes a great mathematician. Some use their bodies; some invent; some compose; some make their living in trade. The field in which each of us can do our best differs from person to person.
Summary
Thinking is processed in the brain, but in the KTM view the brain plays a serving role. What matters is the mind and its intentions, and the function of the five zang organs and the digestive system. Know yourself — including your constitution — and you will understand your mind’s strengths far better than any single test score can tell you.
Related reading: Why Constitution and Disease Are Worth Knowing · The Gallbladder as Judgment Organ
