Spatial parcellations, spectral filtering, and connectivity measures in fMRI: Optimizing for discrimination.

ABSTRACT: The analysis of Functional Connectivity (FC) is a key technique of fMRI, having been used to distinguish brain states and conditions. While many approaches to calculating FC are available, there have been few assessments of their differences, making it difficult to choose approaches, and compare results. Here, we assess the impact of methodological choices on discriminability, using a fully controlled data set of continuous active states involving basic visual and motor tasks, providing robust localized FC changes. We tested a range of anatomical and functional parcellations, including the AAL atlas, parcellations derived from the Human Connectome Project and Independent Component Analysis (ICA) of many dimensionalities. We measure amplitude, covariance, correlation, and regularized partia

SUBMITTER: Sala-Llonch R 

PROVIDER: S-EPMC6492132 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature