Resting-state functional connectivity (rsFC) pre-processing and quality assurance

The rsFC images were pre-processed in the Conn toolbox (https://web.conn-toolbox.org). Pre-processing steps included realignment and unwarping, slice-timing correction, detection of outlier scans, segmentation and normalization of functional images into a standard stereotaxic space (Montreal Neurological Institute [MNI]), and smoothing with 6 mm full width at the half maximum (FWHM) Gaussian kernel. BOLD images were bandpass filtered to a 0.009Hz-0.08Hz window. In addition, to minimize the influence of head motion on rsFC analyses, volumes were censored according to the conservative criteria within the Conn toolbox (any volumes exceeding a global-signal Z-value threshold of 3 or a 0.5 mm volume-to-volume motion threshold). Participants with more than 10% of volumes censored based on these criteria were excluded; this resulted in the removal of two participants from the data set (both had over 10% of volumes censored due to head motion), leaving a total of 29 participants with data meeting all quality control criteria.