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)