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Slow rhythmic oscillations within the human cranium: Phenomenology, origin, and informational significance



Slow rhythmic oscillations within the human cranium: Phenomenology, origin, and informational significance



Fiziologiya Cheloveka 27(2): 47-55, March-April



The slow rhythmic oscillations in the human cranium were studied through two noninvasive methods: the bioimpedance method (volume ratios of the liquid media in the cranium) and ultrasound transcranial dopplerography (the change in blood flow in the middle cerebral artery). These methods made it possible to evaluate the state of the intracranial hemodynamics with a combination of factors. These indices were registered simultaneously, and their spectra were then analyzed to determine the slow oscillations in healthy individuals and in patients with intracranial hypertension and obstructive disorders of the cerebrospinal fluid-conducting pathways. The data were registered at rest and immediately after corrective manual (osteopathic) actions with the use of the PC Macintosh IIsi and the programs Chart-3.52, Cricket Graph-3.32, and Canvas-3.5. It was revealed that the slow oscillations of bioimpedance in the area of frequencies from 0.08 to 0.2 Hz have an intracranial origin and are related to the activity of the mechanisms of blood supply regulation and of oxygen consumption by the brain tissue, as well as to the state of the cerebrospinal fluid dynamics.

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Accession: 011368773

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DOI: 10.1023/a:1011071115227


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