The Organ Clock Project
A year-long exploration of time through form and function
To begin, begin. — William Wordsworth
A few years ago, I hired a wonderful business consultant and a graphic designer to help me create a brand identity for my acupuncture practice. Anyone who has worked with me professionally knows that I am a very hands-on client and can be particular about my aesthetic vision for a final product. As part of my branding process, I wanted to create two graphics that inform much of my work — the five-element wheel and the organ clock.
My near-obsession with five-element theory in Chinese medicine is evident in how I communicate with patients in sessions. Another giveaway is the giant five-element wheel poster hanging in one of my treatment rooms. For me, five-element theory seems a perfectly sane lens through which to view the world and the personalities in it. You will probably identify with one or two elements the way you would with an astrological sign, since they are also governed by elements.
But the organ clock is less obvious and a bit more complicated.
What Is the Organ Clock?
Sitting in my clinic reception area, I look at the beautiful poster my graphic designer created for me. The organ clock — what is it?
It is a discrete, symmetrical, methodical organization of the day, and what your body wants during each hour. A map of 24 hours, broken up into 2-hour periods that direct form and function. It tells you when an element, a channel, an organ, a function of the body — and possibly a desire or feeling — is most active in that window of time.
An agenda for breathing, digesting, feeling, metabolizing, moving matter and fluid through your body, conscious connection, mental activity, time for rest, sleep, and dreams — illustrated in an hour-by-hour process.
I can’t help but think that if done right, this clock is the key to balance, a path to wisdom, and a life well-lived.
To begin, to be, to end, and begin again.
About This Series
I have been tossing around the idea for this project for a few years now. Today begins a year-long journey and meditation on the esoteric roots of this diagnostic tool. Each month I’ll post an article delving into one of the “double-hours” of the organ clock — its organ, its channel, its element, and whatever else I discover researching this very interesting, albeit elusive, part of our medicine.
Origins and History
The organ clock stems from several older Chinese frameworks:
- Yin-yang waxing and waning across day and night
- The twelve earthly branches — a foundational ancient Chinese calendrical and cosmological system that combines 10 Heavenly Stems and 12 Earthly Branches into a 60-part cycle used to track years, months, days, and hours
- Five-element correspondences
- The acupuncture channel circulation model
Its broad medical ancestry is usually linked to early classical Chinese medicine, especially the Huangdi Neijing tradition and later acupuncture and channel literature.
A more technical name for the clock is Zi Wu Liu Zhu — or “midnight-noon ebb-flow.” Zi is midnight, Wu is noon, and liu zhu suggests flowing and pouring: qi and blood moving through timed cycles. Historical acupuncture sources describe timed point selection methods using stems, branches, days, and hours — such as Na Zi Fa (“taking branches”) and Na Jia Fa (“assigning stems”) — to time acupuncture sessions according to the organ clock. A PubMed-indexed historical article specifically discusses Zi Wu Liu Zhu needling and its development during the Jin-Yuan-Song dynasty periods.
The Main Versions
The most popular version of the organ clock — illustrated in the graphic in our reception area — tracks the time, organ/channel, and primary function or activity that each double-hour represents.
The clinical acupuncture version is more complex: Zi Wu Liu Zhu Zhen Fa, where the channel or function to be treated may guide which points are “open” or favored at a particular hour or day. Some systems calculate the heavenly stems and earthly branches to inform a patient protocol, rather than relying on clock time alone.
Related versions include using horary points (each acupuncture channel has one assigned) during the appropriate double-hour, midnight-noon opposite-pair logic, seasonal organ timing, and adjacent systems like Ling Gui Ba Fa — translated as the Eight Methods of the Sacred Turtle. This Daoist technique selects acupuncture points based on time (chronoacupuncture) by establishing the patient’s energetic condition using the Eight Trigrams of the I Ching, the Celestial Stems, and Earthly Branches, and then identifying the Control Point of the Eight Extraordinary Vessels to be treated.
All of these systems have their differences, but they share the same idea: physiology is rhythmic, and treatment can be timed.
Welcome to the Beginning
This is the start of a year-long exploration of time through form and function. Another frontier on the quest to live better for longer.
Follow along each month as we move through each double-hour of the clock — one organ, one element, one window of time at a time.
Christina M. Casado, L.Ac. is the founder of Treehouse Acupuncture & Wellness in Miami, FL. Her practice specializes in Japanese-style acupuncture, five-element theory, and individualized care rooted in classical Chinese medicine.
Ready to experience treatment that works with your body’s natural rhythm? Book an appointment at Treehouse →
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