The Rubicon Group (TRG) is a collaboration of chiropractic educational institutions, emerging educational efforts and interested parties. The seven institutional members include Barcelona College of Chiropractic (Barcelona, Spain); the Chiropraktik Akademie (Dresden, Germany); Life Chiropractic College West (San Francisco, California, USA); Life University (Atlanta, Georgia, USA); McTimoney College of Chiropractic (Abingdon, Oxfordshire, UK); New Zealand College of Chiropractic (Auckland, New Zealand); and Sherman College of Chiropractic (Spartanburg, South Carolina, USA).
TRG has issued the following statement:
The term ‘subluxation’ has been used by the chiropractic profession for over a century.1, 2 It is an important element of chiropractic practice, embedded in legislation and regulation, and its clinical implications have been, and continue to be, scientifically explored.2, 3
The term subluxation, as used by chiropractors, is a researchable concept that is important to health and health care delivery.1, 2, 4 The need to properly define this entity has been widely recognized as a high priority within the profession, as evidenced by the number of groups and organizations who have offered definitions of subluxation.1, 2, 5-10
Many of the past definitions do not provide a testable definition of chiropractic subluxation.11
Some do not reflect the current research that supports a neurologically-centered model of subluxation. 2 The Rubicon Group (TRG) has utilized the current available scientific evidence to define the chiropractic subluxation. Contemporary neurophysiological language and concepts, based on current scientific publications on the topic, have been used. As this definition is subject to ongoing scientific exploration that is likely to lead to new findings and understandings, modifications may be anticipated. However, this definition reflects what is currently known, and it is congruent with current neurophysiological scientific understanding.
“We currently define a chiropractic subluxation as a self-perpetuating, central segmental motor control problem that involves a joint, such as a vertebral motion segment, that is not moving appropriately, resulting in ongoing maladaptive neural plastic changes that interfere with the central nervous system’s ability to self-regulate, self-organize, adapt, repair and heal.”
(The Rubicon Group, May 2017.)
There are three key elements, namely:
A chiropractic subluxation often relates to the spine and its connecting structures. 1 Chiropractic subluxation assessment generally involves evaluating the pathophysiological consequences of the central segmental motor control problem; 4, 12 these may include pain, asymmetry, biomechanical or postural changes (such as changes in relative range of intervertebral motion), changes in tissue temperature, texture and/or tone, and other findings that can be identified using special tests. 12 Once identified, subluxations are corrected using a variety of techniques including high velocity low amplitude chiropractic adjustments, instrument assisted adjustments, and lower force manual techniques and approaches.13
A growing body of scientific evidence has demonstrated that spinal function impacts central neural function in multiple ways,3, 4, 14-19 and that improving spinal function has an impact on clinical outcomes.20-24 Scientists have known for several decades that neurons continuously adapt in structure and function in response to our ever-changing environment.25-27 This ability to adapt is known as ‘neural plasticity’,27 and it is now well understood that the central nervous system can reorganize in response to altered input.28-35 Examples of increased sensory input that can lead to neural plastic changes include repetitive muscular activity 29, 36-41, such as typing or playing the piano, or repeated tactile sensory input such as occurs with blind Braille readers.42 Similar central nervous system change or reorganization may take place due to a decrease in behavior or activity.+ 32, 43-49 Thus the concept, that alterations in paraspinal muscle function due to abnormal spinal movement patterns are capable of changing central neural function, is totally congruent with current neuroscience understanding, as well as current scientific findings.3, 4, 14-19
[references can be found in the original]
Subluxation is not so much a ‘self-perpetuating motor control problem’ as a self-perpetuating money-maker for chiropractors, it seems to me. The history of the use of this term shows that chiropractors have changed its meaning each time they were unable to deny its nonsensicality. To throw subluxation over board is not an option because chiropractic is at its hear a subluxation cult.
Yet, we have repeatedly been told that chiropractors have all but given up the concept of ‘subluxation’. This is clearly not the case. The above statement of TRG speaks for itself, and so does a recent study showing that “the majority of [North American chiropractic] students would like to see an emphasis on correction of vertebral subluxation”. It is the correction of the non-existent subluxation that stimulates the cash flow of chiropractors, a fact known even to the novices of the cult.
The new definition, it seems to me, is little more than self-serving nonsense. Wikipedia – I know, it’s not always the most reliable source, but in this case it is miles better that TRG – has this to say about subluxation: “In chiropractic, vertebral subluxation is a supposed misalignment of the spinal column leading to a set of signs and symptoms sometimes termed vertebral subluxation complex. It has no biomedical basis and is categorized as pseudoscientific by leading authorities. Traditionally, the “specific focus of chiropractic practice” is the chiropractic subluxation and historical chiropractic practice assumes that a vertebral subluxation or spinal joint dysfunction interferes with the body’s function and its innate intelligence, as promulgated by D. D. Palmer, the inventor of chiropractic.”
Wikipedia furthermore mentions that “in 2015, 8 internationally accredited chiropractic colleges: AECC, WIOC, IFEC-Paris, IFEC-Toulouse, USD-Odense, UZ-Zurich, UJ-Johannesburg and Durban University of Technology made an open statement which included: “The teaching of the vertebral subluxation complex as a vitalistic construct that claims that it is the cause of disease is unsupported by evidence. Its inclusion in a modern chiropractic curriculum in anything other than an historic context is therefore inappropriate and unnecessary”.”
Subluxation currently divides the chiropractic profession as we have seen here, for instance. But it is certainly not a concept that most chiropractors have been wise enough to declare obsolete.