Theory of Five Elements
The theory of the five elements has an interesting history and is utilized in the different forms of acupuncture very differently. It seems that some forms, Japanese in particular (including Shiatsu), take it more seriously and it is absolutely instrumental to diagnosis. TCM seems to take it with a grain of salt. Mostly they use it to help explain the etiology of disease and to associate symptoms or signs to particular organ pathologies found in the five element chart.
The theory of five elements or wu xing, was most likely conceived in or around the Warring States Period (476 - 221 BC) by someone named Zou Yen. Interestingly, many translators think that using the term "elements" is almost wrong. Unschuld translates it as "phase" and this seems to me as the best translation yet, although it seems elements has stuck in people's heads and thus it isn't going anywhere. By calling them phases it allures more to the processes that are occurring in both nature and the microcosm that is the body. Particularly it better explains the motion of the generating and controlling cycle (see below). In early texts these same five things are also referred to as basic materials of the universe with an addition of grain as a sixth, so I guess they can be thought of in both ways. Keep the term "phase" in mind though as you learn more.
Five Element Correspondences
Without further adieu here they are, pretty much unchanged from the way it is in the Nan Jing (Yellow Emperor's Classic of Internal Medicine).
|Fu||Gallbladder||Small Intestine||Stomach||Large Intestine||Bladder|
|Tissues||Tendon||Vessel||Muscle||Skin and Hair||Bone|
Quick note: pay attention to the seasons being the first on the list. The Earth element or phase has an interesting position here. In this table it is denoted as Late Summer. In parts of the Nei Jing it is said that it also corresponds to the time in between the seasons.
Movement of the Five Phases
The five phases have a flow in which they move called the Generating Cycle. Again looking at the seasons, put the phases in order by season and you get the image to your right. (I myself wonder if this cycle was originally formed from the concept of Earth being Late Summer or if that was extrapolated later to give some reasoning for this cycle.) Starting with water (a good way to remember it), water generates wood, wood generates fire, fire generates earth, earth generates metal, and metal generates water. The Nan Jing or Classic of Difficulties, makes the analogy of mother to son when it comes to the generating cycle (e.g., fire is the mother and earth is the son, water is the mother wood and wood is the son of water, etc.). This becomes more relevant when we look at the application of this theory to medical applications.
The way I remember it is: Water is the necessary ingredient for plants to grow, thus you get wood. Wood can be rubbed together to form and transform into fire. Fire burns the wood to ash and what is left is earth. Earth in the form of continents crashes together to create mountains of rock from which metal can be drawn. Then the rain falls on the mountains of rock and from the metal, water flows down the ground to nourish the trees. It's a little bit of a stretch but it works. Think up your own and you'll remember.
Now, in true democratic form and of course to preserve balance, the five phases also have a system of checks & balances. This cycle, as seen below, is called the Controlling Cycle. Here the phases insure that no phase is too long or too strong. Again starting from water, water controls fire, fire controls metal, metal controls wood, wood controls earth, earth controls water. Another cycle which is just a further example of the image to the right, is the Over-Acting Cycle. Basically the over-acting cycle is when any given phase is overly strong and not controlled enough. It then takes the element it controls and does damage to it (e.g., water controls fire, but if too much water is used the fire will go out completely, etc.)
The way I remember it is: Water can be thrown to dose out fire. Fire melts metal. Metal in the form of an axe or knife cuts wood. Wood in the form of a tree breaks through the earth to grow. Earth clouds and turns water to mud.
A third way to look at this same image is to reverse the direction of the arrows. If you do this you get the Insulting Cycle. If any phase is extremely strong, it can actually turn around and put down the phase which normally controls it.