TICVLOG Episode 7 Frequency and History

In TIC VLOG Episode 7, I answer a question about the history of adjustment frequency.

Understanding the original protocols of the chiropractic pioneers gives modern chiropractic practice a new perspective.

This is especially relevant because of the literature. Several recent articles have used a 1902 ad from B.J. Palmer, to try and discredit modern practices. In this TIC VLOG, I explain why that approach is deeply flawed.

Chiropractors need to understand the evolution of theories from D.D. Palmer’s earliest approaches to B.J. Palmer’s final theories and practices. We also need to integrate key moments in the history of chiropractic practice such as Drain’s and Craven’s contributions to chronic and acute care. Frequency models continually evolved between the 1930s and the 1990s.

These foundational historical facts and ideas give us a common basis through which we might dialogue.


  • D.D. Palmer proposed yearly chiropractic analysis in 1897.
  • B.J. Palmer’s models of care frequency evolved from 1902 into the 1950s. Any use of his ideas should include those facts.
  • Several articles in the literature use a B.J. Palmer ad from 1902, out of context from the rest of his life, to make a point about modern practice.
  • J.R. Drain pioneered acute and chronic adjusting protocols.
  • The 3-2-1 frequency model probably emerged from the Parker Seminars in the 1980s.
  • Epstein’s frequency model from the late 1990s was based on the findings from two qualitative studies (retrospective and longitudinal).

Resources for this Episode:



* Music written, arranged, and performed by Dan Mills, Mark Goodell, Adam Podd

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