Bio-Geometric Integration

Bio-Geometric Integration, known throughout the profession as BGI, is built on a single reframing. The subluxation is not a bone that has moved. It is an experience the body could not finish processing, held in the physiology as stored potential. Dr. Sue Brown practised Network Chiropractic alongside Dr. Donald Epstein, then left to build a method of her own, and first taught BGI in 2000. What she left is a way of reasoning about where tension sits and why a light contact can do the work of a thrust.

An oceanographer’s view of stored force

Brown came to chiropractic from the earth sciences, and the transfer is the whole origin of the method. She had worked as an oceanographer, studying how the planet loads force along its structures and releases it in seismic events. She graduated from Palmer College of Chiropractic in 1987 and began practising in April 1988, later building Essence Quality of Life Center in the western suburbs of Chicago.

She spent years practising Network Chiropractic alongside Dr. Donald Epstein, and then left that work to build something of her own. BGI is not a branch of Network. It shares the breath, the light contact, and the emphasis on the nervous system reorganising itself, because those were ideas she had worked with for years. What she did with them afterward is hers, and it began with what her first career had trained her to see. A structure under load stores that load somewhere. It releases according to the geometry of the structure rather than at the point of impact.

BGI was first taught formally in 2000. Brown died in 2015, and the work continues through the instructors she trained.

Every experience arrives as information

Brown’s starting position is that experience is not a category with four types. It is one thing wearing four coats.

A fall, a chemical exposure, a grief, and a belief all arrive at the body as information. What separates one from another is not the label but the quality of what arrives, which she described in the language of vibration and tone. The body meets that information and does one of two things with it. It integrates it, or it stores it.

Integration is the ordinary outcome, and Brown described its result as an increase in capacity. The system takes in something it has not met before, reorganises around it, and afterward can do something it could not do before. She used the body’s own cell biology to make the point. Every cell carries the complete genetic information, and a liver cell differs from a heart cell not by what it holds but by what has been activated in it. Capacity, on this reading, is a question of what the system has switched on.

Brown taught this from 1987 onward as the reason two people meet the same event and keep different amounts of it. She illustrated the mechanism with two guitars set side by side. Pluck a string on one and the matching string on the other begins to sound, because it sits in the same field and is built to answer that frequency. An experience that the body can answer gets integrated, and something previously dormant comes online.

The subluxation redefined as stored potential energy

The other outcome is the one BGI is built to address. When an experience is not integrated, it does not disappear. It stays in the physiology, and the body organises itself around the unfinished business.

Brown called the result a dissonance. The system is still playing, but it is now playing something that does not resolve, and the whole structure arranges itself to accommodate that. Geometry distorts down to the cellular level. Bones sit differently. Soft tissue carries tension it was not designed to hold. The result is what chiropractic has always called the subluxation, reached from the other direction.

The adjustment follows from the definition. It is not a correction imposed from outside and it is not an argument with a bone. It is a release of stored potential, which hands the system a second opportunity to integrate what it could not process the first time. Bones moving and pain easing are consequences of that release rather than the target of it.

Brown set the model out in Subluxation and Human Evolution: A Philosophical Model of Subluxation, published in the Journal of Vertebral Subluxation Research in June 2007.

Why BGI holds that a subluxation is never local

The sharpest structural claim in BGI follows from architecture rather than philosophy.

A tensegrity structure combines rigid compression elements with a continuous tension network, and it sits under standing tension even at rest. That prestress is what makes it a transmission array. A force introduced anywhere redistributes across the whole structure immediately rather than staying where it landed. Donald Ingber established that this architecture operates at cellular scale, where prestress in the cytoskeleton carries mechanical signals across the cell and couples distant structures into a single response.

Brown took the consequence seriously. If the body is built this way, then naming one subluxated segment describes a focus rather than a location. The whole structure expresses the distortion. One segment is where it concentrates, and that concentration is where the contact goes.

Ingber published that finding in 1997, and it is the measured half of Brown’s claim. This is why BGI reasons in planes and shapes rather than in segments alone. The practitioner works through posterior, anterior, sagittal, and coronal relationships and through triangular, pyramidal, and tetrahedral geometry. Brown held that the body has innate shapes, that distortion shows up as those shapes losing their proportions, and that restoring the relationships matters more than restoring any one bone.

The four pathways a subluxation interferes with

Classical chiropractic named one pathway. Brown named four, on the argument that a definition written for the science of 1895 could not carry the science that followed it.

In her framing a stored distortion shows up in four places at once. Geometry alters down to the cellular level. Bones misalign, with tension carried through the soft tissues and the nervous system. The body’s electromagnetic field loses coherence, and its neurochemistry loses coordination. Her point was that innate intelligence does not communicate through nerves alone, so a definition restricted to nerve interference describes one channel out of several.

The Unified Model of Tone reads those four as one thing seen from four angles. Tension, membrane potential, autonomic bias, field coherence, and neurochemical coordination are not separate systems that happen to fail together. They are projections of a single underlying organisation, each the face that organisation turns toward a particular instrument. On that reading Brown was not adding three pathways to chiropractic’s one. She was describing four measurements of the same state, and the reason they move together is that there was only ever one variable moving.

What Brown rejected in the classical philosophy

Brown’s critique of her own profession’s philosophy is the most unusual thing in the BGI material, and it is more pointed than most external criticism. She kept the 1895 foundations and discarded three later additions.

She accepted the core without reservation. An organising intelligence exists, it can be interfered with, and it works toward health. Each of the three rejections changed the clinical model that followed.

That healing takes time

Sometimes it does and sometimes it does not, and she held that the profession had turned a frequent observation into a law. She pressed the harder question underneath it, which is how healing is being measured at all. Symptom resolution and restored regulation are different measurements, and a system can recover its range faster than it clears its symptoms.

That matter has limits innate must work within

Her objection is a physics objection. Matter resolves to energy, and the constraints the classical philosophy places on matter are not constraints anyone places on energy. Carrying the limitation forward without examining it struck her as inherited rather than reasoned.

That universal forces destroy and innate forces build

She rejected the moral sorting outright. If an organising intelligence is perfect, then its expression is perfect, and an event being uncomfortable does not make it destructive. What the profession had labelled good and bad she read as one process that is sometimes pleasant and sometimes not.

That last rejection is what produced the potential energy model. If nothing arriving at the body is inherently destructive, then a subluxation stops being damage and becomes unfinished processing. The clinical consequence is large. A practitioner who believes the body is broken works to repair it. A practitioner who believes the body is mid-sentence works to let it finish.

BGI is grounded in Palmer’s teaching on tone

Brown did not present BGI as a departure from chiropractic’s founding ideas. She presented it as a return to the part of them the profession stopped reading.

D.D. Palmer built his science on tone rather than on displaced bone, and he said so directly. He wrote that tone is the source or origin of all life, and that upon the comprehension of tone he built the grandest science of this or any age. He described tone as a law which can be comprehended, a principle upon which others are founded. He also defined its failure in both directions, naming the cause of disease as any variation of tone, nerves too tense or too slack.

Brown read the classical triunity of intelligence, force, and matter as a claim that energy precedes structure, and she pointed out that physics arrived at the same place independently. She cited Max Planck. After a career spent studying matter he concluded that matter exists by virtue of a force, and that mind stands behind it.

She also noted the convergence of the period. Maxwell’s field equations, Einstein’s relativity, Planck’s quantum theory, and Palmer’s chiropractic all appeared within a few decades either side of 1900. Her reading was that these were not four unrelated events but one shift in what the era was prepared to see.

Where BGI meets the Unified Model of Tone

Brown reached the Unified Model of Tone’s central claims from a different direction, and the overlap is close enough to be worth stating precisely.

Tone in this model is not a vibration. It is the integrated organisation of the body’s interacting states, the way its mechanical, electrical, chemical, fluid, and neural processes stand in relation to one another at a given moment. The chord is not the notes. It is the relationship among them, and it is the chord the body actually plays. Brown’s music, and the dissonance she describes when an experience fails to integrate, is a description of that organisation losing its resolution.

Four correspondences carry most of the weight.

The four points of contact between the two models

Stored potential is tone carrying history. Tone holds the accumulated record of everything the system has integrated, because that record is embodied in how the system is now organised. Brown’s stored experience and the model’s tone-as-memory are the same claim. Where she said the body holds what it could not finish, the model says the present organisation is the history.

The loop that fails to complete. The model describes a recursive cycle. An input registers, tone changes, structure and function reorganise, behaviour changes, and the next input arrives at a system already altered. A distortion is that loop failing to close. Brown’s unintegrated experience is a named instance of it.

Correspondence, not force. The model holds that what makes an input effective is not its magnitude but whether the system registers it as information about itself. Magnitude is a separate axis running from a fingertip to surgery. This is the formal statement of what BGI practises when it matches contact to tissue and waits for a point of rapport. A light touch that is registered outperforms a heavy one that is not.

No single lynchpin. The model rejects the idea that one segment governs the system, on the same architectural grounds Brown used. Distortion is distributed and expressed through the whole tension network, and the point of contact is where the system is most available to change rather than where the fault lives.

Two claims the model carries as predictions

Two of BGI’s claims sit ahead of the measurement, and the model states them as predictions.

The first is that field coherence and neurochemical coordination move together with mechanical and neural state as readings of one variable. That prediction is testable, and it is the same claim the unified model makes about its own measures. The second is the bidirectional signature. If an adjustment restores regulation rather than pushing an output, then people starting with too much tension and people starting with too little should both move toward the middle. The spread across a group should narrow. An input that only pushes one direction is doing something else.

How a BGI adjustment is delivered

BGI prescribes no universal thrust, and the absence is deliberate. The method is a set of principles applied through assessment, breath, and geometric reasoning. Its instruction lives in the BGI Osseous Manual, created by Brown with contributions from Katina Manning, Lou Corleto, and Valerie Pennacchio. The foundational BGI 1, BGI 2, and BGI 3 manuals sit alongside it.

Where the tension sits decides the contact

This is the practical core. If the stored tension sits in bony structure, the correction looks like a conventional adjustment and may cavitate. If it sits in ligament, fascia, or muscle, the contact is light fingertip pressure whose purpose is to bring the system’s attention to the pattern. The same reasoning covers a newborn and an adult, because the question is where the tension is rather than how much force the person can absorb.

The other working principles

• Assessment first. The practitioner maps tension to determine whether the system is ready, seeking the most receptive tissue rather than a predetermined segment. BGI calls these points of rapport.
• Breath carries the work. Contacts are synchronised to the patient’s own breath and movement, which makes the patient an active participant rather than a passive recipient.
• Sequence is composed. The order of contacts follows the body’s geometry rather than a fixed checklist, so a session has a structure rather than a list.
• Integration pauses are built in. The practitioner waits and lets the system reorganise before the next contact, instead of driving rapid serial thrusts.

BGI uses no proprietary instrument. Practitioners layer it onto whatever adjusting they already perform.

Who carries BGI forward

The work is stewarded by BGI Seminars, LLC. Its foundational curriculum runs BGI 1, BGI 2, and BGI 3, alongside BGI Osseous, BGI Animal, and BGI Playshops. An elective is offered at Life University in Marietta, Georgia.

Regional bodies extend the reach. BGI Europe Seminars runs a sequential geometry curriculum across cities including Amsterdam, Hamburg, Paris, and Venice, and BGI Australia serves practitioners in its region. Liliana Warner, DC, is named as lead instructor for BGI 1 in the United States. Amy Burke, DC, developed and teaches the Sagittal Geometry seminar for BGI Europe. Katina Manning, Lou Corleto, and Valerie Pennacchio remain senior figures in the teaching community.

Lineage and influence

BGI has no parent technique, and Brown did not set out to extend anyone else’s. She practised Network Chiropractic alongside Dr. Donald Epstein, then left and built her own method, and BGI stands on its own terms rather than as a branch of that work. It shares a good deal with the tonal world she came from, including the light contact, the breath, the release of stored somatic tension, and the active role of the patient. Those are held in common rather than inherited. BGI is Brown’s attempt to give the tonal world a geometric framework and to build a bridge back toward osseous, thrust-based practice.

Into that base she folded biotensegrity, fractal geometry, systems biology, and her own seismic models of how structures load and release. BGI was named in an American Chiropractor feature as one of chiropractic’s ten great approaches. It sits today in the tonal and vitalistic wing of the profession, alongside Network Spinal Analysis and the Torque Release tradition.

How this page relates to the rest of the library

BGI sits close to several neighbours in this library, and each connection is specific.

The Unified Model of Tone makes the same structural argument Brown made, that organisation precedes structure and that an input is transformed by the state receiving it. Network Chiropractic is where Brown practised before she left to build BGI, and the two share breath work and low force without either descending from the other. Network Spinal Analysis is a later era of that separate line. Torque Release Technique reaches the same nervous system through a different doorway, favouring minimal registered input over mechanical correction. The Nervous System covers the sensory architecture that makes a light contact capable of changing output at all. The full index of 33 techniques places BGI among the low force approaches.