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Cranial Manipulation Induces Sequential Changes in Blood Flow Velocity on Demand

Journal: The AAO Journal Date: 2004/09, 14(3):Pages: 15-17, type of study: clinical trial

Free full text   (https://www.academyofosteopathy.org/aaoj)

Keywords:

blood flow [20]
cardiovascular system [10]
clinical trial [612]
cranial osteopathy [62]
cranial rhythmic impulse [25]
laser-Doppler flowmetry [2]
OMT [2951]
osteopathic manipulative treatment [2973]
primary respiratory mechanism [31]
Traube-Hering-Mayer oscillation [8]

Abstract:

Primary Objective: To demonstrate that when cranial manipulation is applied as a therapeutic intervention, the dominant, 0.1 Hz frequency, Traube-Hering (TH) component of blood flow velocity that is related to baroreflex activity is specifically amplified. Further, when intervention is stopped, the flowmetry record reflects the change in intervention. In this instance, the timing of cranial treatment depends only upon a pre-established protocol. Methods: Using laser-Doppler flowmetry to quantify the TH and other components of the blood flow velocity oscillation, we compared flowmetry records of 15 subjects before and immediately following cranial manipulation. The timing of the treatment/non-treatment sequence was established prior to manipulative intervention. Results: Selected continuous record segments from within treatment and non-treatment portions of the experimental flowmetry records were converted to frequency-domain spectra via a Fourier-transformation (FT). From the FT data, difference spectra were computed by subtracting the spectrum acquired during a non-treatment segment from the spectrum of adjacent treatment-period records. The resultant difference showed that cranial manipulative treatment enhanced the magnitude of the 0.1 Hz component and increased the fundamental heart rate. No other prominent changes with treatment were observed. Conclusions: Flowmetry shows that cranial manipulation may be used to alter the 0.1 Hz blood flow component of the TH oscillation according to a pre-determined protocol. Thus, cranial manipulation may be used to alter blood flow according to specific interventional directives.


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