Spectral analytical studies of the circulatory and respiratory rhythms during sleep at night have shown (illustration 12) that, besides the pulse-breathing-ratio, the frequency ratios to the blood pressure rhythm and minute rhythm of the peripheral blood circulation are adjusted with great precision to the whole numbered quotient value 4:1 (double octave), if during sleep at night the regenerating functions of the metabolic system predominate.
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Prof. Dr. med. Gunther Hildebrandt • Chronobiological Aspects of Music Physiology
Illustration 12
Frequency distribution of the spectral analytical preferential frequencies of the heart rhythm, breathing rhythm, blood pressure rhythm and minute rhythm of the peripheral blood circulation found during the course of sleep of the current heart frequency in 17 subjects in 47 nocturnal sleep studies. The preferential frequencies each relate to each other at a whole numbered ratio of 4:1.
(According to RASCHKE and colleagues 1977)
