title: 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?
abstract: 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.
authors.affiliation: Psychophysiologisches Labor, Klinik für Psychosomatik und Psychotherapeutische Medizin, Medizinische Fakultät der Rheinisch-Westfälisch-Technischen Hochschule Aachen, 52057 Aachen, Germany. vmperlitz@ukaachen.de
authors.forename: Volker
authors.initials: V
authors.lastname: Perlitz
authors.forename: Manfred
authors.initials: M
authors.lastname: Lambertz
authors.forename: Birol
authors.initials: B
authors.lastname: Cotuk
authors.forename: Reinhard
authors.initials: R
authors.lastname: Grebe
authors.forename: Ralf
authors.initials: R
authors.lastname: Vandenhouten
authors.forename: Guido
authors.initials: G
authors.lastname: Flatten
authors.forename: Ernst Richard
authors.initials: ER
authors.lastname: Petzold
authors.forename: Holger
authors.initials: H
authors.lastname: Schmid-Schönbein
authors.forename: Peter
authors.initials: P
authors.lastname: Langhorst
mesh_terms: D000818:Animals; D001794:Blood Pressure; D002320:Cardiovascular Physiological Phenomena; D004285:Dogs; D004594:Electrophysiology; D005260:Female; D006801:Humans; D008297:Male; D008526:Medulla Oblongata / Q000502:physiology; D008833:Microcirculation; D008875:Middle Aged; D009474:Neurons / Q000502:physiology; D010507:Periodicity; D017156:Photoplethysmography; D012064:Relaxation Therapy; D012143:Respiratory Physiological Phenomena; D012154:Reticular Formation / Q000502:physiology*; D012867:Skin / Q000098:blood supply