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The 2010 Northup Memorial Lecture: Low Frequency Oscillations in Human Physiology and Cranial Osteopathy

Journal: The AAO Journal Date: 2011/03, 21(1):Pages: 12-23, type of study: clinical trial

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

Keywords:

laser Doppler flowmetry [2]
cranio-sacral osteopathy [158]
CRI [102]
cranial rhythmic impulse [25]
clinical trial [612]

Abstract:

The use of laser-Doppler flowmetry provides the opportunity to study Cranial Osteopathy in the context of quantifiable aspects of human physiology. Six studies, spanning a period from 1998 to the present, are reviewed that support the following conclusions: 1. Palpation of the CRI tracks identifiable frequencies in bloodflow velocity. 2. Cranial palpation alone may be employed as sham treatment in future research into the clinical impact of cranial manipulation. 3. Cranial manipulation appears to exert effects upon baroreflex physiology. 4. Cranial manipulation affects the low-frequency (0.10- 0.20 Hz) signal, and to a lesser extent the very lowfrequency (0.003-0.05 Hz) signal in bloodflow velocity, and does so in a manner consistent with the type of manipulative procedure being employed. 5. A frequency signal of 0.08 Hz (0.04-0.11 Hz) has been identified in the flowmetry record that is closely related to the 0.10-0.20 Hz signal. Both are demonstrated to be affected by cranial manipulation, in this case CV-4. 6. Although not everyone appears to be palpating at the same frequency, everyone tracks the 0.10-0.20 Hz signal, with the majority tracking at 0.04-0.11 Hz or 1 CRI cycle to 2 low-frequency bloodflow velocity waves. 7. A new normative range for the CRI of 2-7 cpm, as palpated by experienced examiners, has been identified.


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