TY - JOUR A1 - Perlitz, Volker A1 - Lambertz, Manfred A1 - Cotuk, Birol A1 - Grebe, Reinhard A1 - Vandenhouten, Ralf A1 - Flatten, Guido A1 - Petzold, Ernst Richard A1 - Schmid-Schönbein, Holger A1 - Langhorst, Peter T1 - Cardiovascular rhythms in the 0.15-Hz band: common origin of identical phenomena in man and dog in the reticular formation of the brain stem? JF - Pflügers Archiv: European Journal of Physiology N2 - Selected examples from experiments in humans and dogs with time series of reticular neurons, respiration, arterial blood pressure and cutaneous forehead blood content fluctuations were analysed using multiscaled time-frequency distribution, post-event-scan and pointwise transinformation. We found in both experiments a “0.15-Hz rhythm” exhibiting periods of spindle waves (increasing and decreasing amplitudes), phase synchronized with respiration at 1:2 and 1:1 integer number ratios. At times of wave-epochs and n:m phase synchronization, the 0.15-Hz rhythm appeared in heart rate and arterial blood pressure. As phase synchronization of the 0.15-Hz rhythm with respiration was established at a 1:1 integer number ratio, all cardiovascular-respiratory oscillations were synchronized at 0.15 Hz. Analysis of a canine experiment supplied evidence that the emergence of the 0.15-Hz rhythm and n:m phase synchronization appears to result from a decline in the level of the general activity of the organism associated with a decline in the level of activity of reticular neurons in the lower brainstem network. These findings corroborate the notion of the 0.15-Hz rhythm as a marker of the “trophotropic mode of operation” first introduced by W.R. Hess. KW - vegetative rhythm KW - cardiovascular-respiratory coordination KW - n:m phase synchronization KW - autogenic training KW - lower brainstem dynamics KW - non-linear analysis Y1 - 2004 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-9348 SN - 1432-2013 VL - 448 IS - 6 ER -