Multifractal Analysis of Laser Doppler Flowmetry Signals: Partition Function and Generalized Dimensions of Data Recorded before and after Local Heating

TitreMultifractal Analysis of Laser Doppler Flowmetry Signals: Partition Function and Generalized Dimensions of Data Recorded before and after Local Heating
Type de publicationArticle de revue
AuteurHumeau-Heurtier, Anne , Buard, Benjamin, Rousseau, David, Chapeau-Blondeau, François , Abraham, Pierre
EditeurPolish Scientific Publishers
TypeArticle scientifique dans une revue à comité de lecture
Année2012
LangueAnglais
Date2012
Numéro1
Pagination17 - 26
Volume32
Titre de la revueBiocybernetics and Biomedical Engineering
ISSN0208-5216
Mots-clésGeneralized, Laser, local, microcir-culation, multifractal, partition
Résumé en anglais

Laser Doppler flowmetry (LDF) signals - that reflect the peripheral cardiovascular system - are now widespread in blood microcirculation research. Over the last few years, the central cardiovascular system has been the subject of many fractal and multifractal works. However, only very few multifractal studies of LDF signals have been published. Such multifractal analyses have shown that LDF data can be weakly multifractal but the origin of such characteristics are still unknown. We therefore herein propose a multifractal analysis of LDF signals recorded on the forearm of twelve healthy subjects, before and after skin local heating. The results show that the partition functions for all the signals have power-law characteristics. Moreover, generalized dimensions present very few variations with q for the signals recorded before heating; these variations are larger 20 minutes after local heating. Physiological activities may therefore play a role in the weak multifractal properties of LDF data.

URL de la noticehttp://okina.univ-angers.fr/publications/ua1465
DOI10.1016/S0208-5216(12)70029-3
Lien vers le document

http://dx.doi.org/10.1016/S0208-5216(12)70029-3