Chapter 7
Synergetic Interpretation of Patterned
Vasomotion Activity in Microvascular
Perfusion: Application to Objective
Recording of Subjective Responses
to Pain
Holger Schmid-Schönbein
Abstract Using pragmatic recording and data compression tools developed by the
Institute of High Frequency Technology, RWTH Aachen University, a method was
developed allowing to portray the dynamics of periodically varying cardiovascular
movement patterns of the blood content (depicted by transmission and reflecting
plethysmography, PPG) and blood cell displacement in microvessels (depicted by
Laser-Doppler anemometry technique, LDA) in the form of so-called frequency chromatograms. These are constructed subsequent to Fourier transformation of the aperiodically fluctuating data obtained by photometric or anemometric means, where characteristic frequencies are displayed as a function of the logarithm of the frequency.
In addition, the compressed time series of the obtained data (recorded from the
sites of interest and from the hyperemic forehead of the subjects and patients) were
being displayed. The resulting records of computer-based data compression are being
called “double plots”. These are a convenient means for displaying the fundamental
fact emphasised by Haken and Koepchen, stating that all physiological activities
controlled by central nervous systems are dominated by so-called quasi-attractors,
i.e. transient cooperativities of ensembles of neurons and effectors.
Holger Schmid-Schönbein is deceased.
H. Schmid-Schönbein (B)
Department of Physiology, RWTH Aachen University Hospital, Aachen, Germany
e-mail: perfusion.group@hia.rwth-aachen.de
© Springer Nature Singapore Pte Ltd. 2021
V. Blazek et al. (eds.), Studies in Skin Perfusion Dynamics,
Biological and Medical Physics, Biomedical Engineering,
https://doi.org/10.1007/978-981-15-5449-0_7
113
Synergetic Interpretation of Patterned
Vasomotion Activity in Microvascular
Perfusion: Application to Objective
Recording of Subjective Responses
to Pain
Holger Schmid-Schönbein
Abstract Using pragmatic recording and data compression tools developed by the
Institute of High Frequency Technology, RWTH Aachen University, a method was
developed allowing to portray the dynamics of periodically varying cardiovascular
movement patterns of the blood content (depicted by transmission and reflecting
plethysmography, PPG) and blood cell displacement in microvessels (depicted by
Laser-Doppler anemometry technique, LDA) in the form of so-called frequency chromatograms. These are constructed subsequent to Fourier transformation of the aperiodically fluctuating data obtained by photometric or anemometric means, where characteristic frequencies are displayed as a function of the logarithm of the frequency.
In addition, the compressed time series of the obtained data (recorded from the
sites of interest and from the hyperemic forehead of the subjects and patients) were
being displayed. The resulting records of computer-based data compression are being
called “double plots”. These are a convenient means for displaying the fundamental
fact emphasised by Haken and Koepchen, stating that all physiological activities
controlled by central nervous systems are dominated by so-called quasi-attractors,
i.e. transient cooperativities of ensembles of neurons and effectors.
Holger Schmid-Schönbein is deceased.
H. Schmid-Schönbein (B)
Department of Physiology, RWTH Aachen University Hospital, Aachen, Germany
e-mail: perfusion.group@hia.rwth-aachen.de
© Springer Nature Singapore Pte Ltd. 2021
V. Blazek et al. (eds.), Studies in Skin Perfusion Dynamics,
Biological and Medical Physics, Biomedical Engineering,
https://doi.org/10.1007/978-981-15-5449-0_7
113