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The primary respiratory mechanism (PRM) as manifested by the cranial rhythmic

impulse (CRI), a fundamental concept to cranial osteopathy, and the Traube-Hering-

Mayer (THM) oscillation bear a striking resemblance to one another. Because

of this, the authors developed a protocol to simultaneously measure both phenomena.

Statistical comparisons demonstrated that the CRI is palpably concomitant with

the low-frequency fluctuations of the THM oscillation as measured with the Transonic

Systems BLF 21 Perfusion Monitor laser-Doppler flowmeter. This opens

new potential explanations for the basic theoretical concepts of the physiologic mechanism

of the PRM/CRI and cranial therapy. Comparison of the PRM/CRI with

current understanding of the physiology of the THM oscillation is therefore warranted.

Additionally, the recognition that these phenomena can be simultaneously

monitored and recorded creates a new opportunity for further research into what

is distinctive about the science and practice of osteopathic medicine.

(Key words: osteopathic medicine, cranial osteopathy, primary respiratory

mechanism, cranial rhythmic impulse, cardiovascular system, lymphatic system, laser-

Doppler flowmetry, Traube-Hering-Mayer oscillation)

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