Meridian Theory in Traditional Chinese Medicine

Before we go looking for the meridians in the body, it’s worth asking who named them. The word “meridian” isn’t Chinese at all: it was a French consul, Georges Soulié de Morant (1878–1955), who coined it in the early twentieth century to render the term jingluo (经络), literally “the channels and the network.” He borrowed the image from geography: the meridians that gird the globe, those invisible lines of longitude. From the very start, then, we read the Chinese body through a mapmaker’s metaphor.

Which brings up the question everyone eventually asks: do the meridians really exist? The scalpel has never found a “channel of Qi.” But the honest answer is more interesting than a simple yes or no.

Book an appointment at the clinic → (opens in a new tab)

---

A mapmaker’s word, a founding text

The earliest descriptions of these pathways appear in the classics, foremost among them the Huangdi Neijing, which organizes the circulation of Qi into a network linking the body’s surface to its inner functions. The Chinese speaks of jing (经, the warp of a fabric, the main thread) and luo (络, the branching collaterals, the net): not pipes, but a weave. “Meridian” came much later, from Soulié de Morant’s pen, and froze into clean lines what was first a mesh.

---

The twelve main meridians

The tradition counts twelve principal meridians, each tied to a function. A word of caution first: the organ name here designates a function in the TCM sense, not the anatomist’s organ.

1. Lung (LU): governs respiratory Qi and is linked to the skin.
2. Large Intestine (LI): associated with absorption and the elimination of waste.
3. Stomach (ST): central to digestion and the distribution of nutrients.
4. Spleen (SP): responsible for transforming and transporting nutrients.
5. Heart (HT): linked to the Blood and said to house the mind (Shen).
6. Small Intestine (SI): sorts and absorbs essential nutrients.
7. Bladder (BL): governs the elimination of fluids; paired with the Kidney, to which the tradition attributes the bones.
8. Kidney (KI): root of the body’s Yin and Yang, it stores the Essence (Jing) received at birth, the Earlier Heaven, which the Spleen and Lung then replenish.
9. Pericardium (PC): said to protect the Heart and relate to emotional life.
10. Triple Burner (TE): associated with the regulation of warmth and fluids.
11. Gallbladder (GB): linked to decision-making and the tendons.
12. Liver (LR): said to ensure the free flow of Qi and to store the Blood.

Alongside these twelve, the tradition describes a second, deeper set of channels: the eight extraordinary vessels.

---

Do they exist? Two maps, one territory

Let’s put the anatomical question plainly. Dissect an arm: you’ll find muscles, nerves, vessels. No “meridian.” For a long time the verdict followed quickly: no structure, therefore pure fiction.

And yet the old map may trace something real. In 2002, the anatomist Helene Langevin overlaid the meridian points and pathways onto cross-sections of the human body (The Anatomical Record): more than 80% of the points and most of the pathways run along the planes of connective tissue — the fascia — that separate and wrap the muscles. “Needle grasp,” that tug where the needle seems caught, is measurably different there. None of this “proves” the theory; but it makes the hypothesis a serious one: that the meridians are a functional chart of the body’s connective architecture and planes of sensation.

This is why “do they exist?” may be the wrong question: it’s the one we would ask of the equator. The equator isn’t a thing buried in the ground, yet it tracks something real: latitude. The meridian is a clinical line, invisible to the scalpel yet seeming to follow real contours (fascia, lines of sensation, zones of referral). Two maps of one territory: the anatomist’s, which carves out structures; the tradition’s, which traces routes of influence and treatment. Neither is the body; each serves a different journey.

---

Balance and imbalance, according to the tradition

The tradition holds that everyday factors (emotional strain, fatigue, lifestyle) can “disturb” circulation in the meridians, producing signs it reads as excess or deficiency. It’s a symbolic lens, not a physiological measurement.

---

Clinical relevance

In the treatment room, the meridian map helps the acupuncturist organize what they observe and guide the choice of points. Acupuncture works alongside your usual care.

---

What the research says

Meridian theory remains a traditional framework: the correspondence with fascia is a fascinating research lead, not a validation of the model nor proof of effectiveness. The clinical value of acupuncture is assessed concern by concern, study by study (see what the research shows).

---

In short

Meridian theory offers a holistic perspective on the body that’s distinctive to TCM: a traditional language (perhaps closer to the terrain than we once thought) that guides the practice of acupuncture, distinct from biomedical anatomy but not a stranger to it.

---

To go further: explore our treatments.

Ready to consult? Book online in the Plateau-Mont-Royal, seven days a week.