The impact of hemodynamic variability and signal mixing on the identifiability of effective connectivity structures in BOLD fMRI
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DOI: 10.1002/brb3.777
Abstract: Multiple computational studies have demonstrated that essentially all current analytical approaches to determine effective connectivity perform poorly when applied to synthetic functional Magnetic Resonance Imaging (fMRI) datasets. In this study, we take a theoretical approach… read more here.
Keywords: hemodynamic variability; variability signal; effective connectivity; connectivity ... See more keywords
Including the Magnitude Variability of a Signal in the Ordinal Pattern Analysis
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DOI: 10.3390/e27080840
Abstract: One of the most popular and innovative methods to analyse signals is by using Ordinal Patterns (OPs). The OP encoding is based on transforming a (univariate) signal into a symbolic sequence of OPs, where each… read more here.
Keywords: signal ordinal; signal magnitudes; variability; variability signal ... See more keywords