+In general, chiropractors who characterize themselves as
pain-based use pain and other symptoms as indicators to identify the clinical target for intervention. A
functional-based chiropractor would rely on joint play, static and motion palpation as well as orthopedic tests to idenity the clinical target, whereas a
structural-based chiropractor who emphasize the importance of posture, as assessed visually or by x-ray line marking. A
subluxation-based chiropractor would posit that their principle role is to identify and correct subluxations, with or without the presence of symptoms. A
tonal-based would posit that the spine cord has an optimal inherent vibratory tone or frequency, similar to the strings of a guitar, and that this optimal vibratory tone is compromised in the presence of vertebral subluxation.
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