Palmer hypothesized that vertebral joint misalignments, which he termed vertebral subluxations, interfered with the body's function and its inborn ability to heal itself. D. D. Palmer repudiated his earlier theory that vertebral subluxations caused pinched nerves in the intervertebral spaces in favor of subluxations causing altered nerve vibration, either too tense or too slack, affecting the tone (health) of the end organ. D. D. Palmer, using a vitalistic approach, imbued the term subluxation with a metaphysical and philosophical meaning. He qualified this by noting that knowledge of innate intelligence was not essential to the competent practice of chiropractic. This concept was later expanded upon by his son, B. J. Palmer, and was instrumental in providing the legal basis of differentiating chiropractic from conventional medicine. In 1910, D. D. Palmer theorized that the nervous system controlled health:
The next step in the process was an X-ray. Having an X-ray done of your spine can help the chiropractor determine your treatment plan and can aid in the adjustment. That said, not all chiropractors will recommend an X-ray at your appointment. It turns out some chiropractors say that X-rays should be part of routine chiropractic care, while others argue X-rays aren't necessary for every patient. When researching potential chiropractors, feel free to ask if they recommend X-rays for all patients and how the X-rays can benefit your treatment plan.
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The patients were put into two groups. One group received traditional medical care for back pain along with chiropractic care; the other group only received traditional care. While traditional care can include medication, the chiropractic care included spinal manipulation adjustments along with manual therapies such as ice, heat, cryotherapy, and rehabilitative exercises.
Analysis of a clinical and cost utilization data from the years 2003 to 2005 by an integrative medicine independent physician association (IPA) which looked the chiropractic services utilization found that the clinical and cost utilization of chiropractic services based on 70,274 member-months over a 7-year period decreased patient costs associate with the following use of services by 60% for in-hospital admissions, 59% for hospital days, 62% for outpatient surgeries and procedures, and 85% for pharmaceutical costs when compared with conventional medicine (visit to a medical doctor primary care provider) IPA performance for the same health maintenance organization product in the same geography and time frame.