Fractal is ubiquitous. Fractal has been also observed in resting state functional magnetic resonance imaging (rs-fMRI) by a number of studies, which is exhibited as 1/f power low scaling in low frequencies. But, it is still unclear which physiological resources underly the fractal behavior. It may be attributed to a variety of resources ranging from neuronal population activities to non-neuronal activities like hemodynamics and (Brownian) subject motion. It lets me assume that the non-neuronal resources of fMRI signals might be separated through removing fractal components, in other words, filtering out non-neuronal components from the fMRI signals, as long as the fractal behavior may be caused by non-neuronal resources. What do you think physiological resources of fractal behavior are in resting state fMRI? Do you think whether it is valuable to separate non-fractal components from fractal components in resting state fMRI signals? I already published an article on it a few years ago, but I am just wondering how the scientific community thinks of these questions.
References
1. Maxim V, Sendur L, Fadili J, Suckling J, Gould R, Howard R, Bullmore ET, \cSendur L. Fractional Gaussian noise, functional MRI and Alzheimer’s disease. Neuroimage [Internet]. 2005;25:141–158.
2. You W, Achard S, Stadler J, Brückner B, Seiffert U. Fractal analysis of resting state functional connectivity of the brain. In: 2012 International Joint Conference on Neural Networks. Brisbane: IEEE; 2012.
Conference Paper Fractal analysis of resting state functional connectivity of the brain
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