Methodology of QPP timings: extracting a null QPP
Description
To understand the timing relationship of long (10s) QPPs, an extraction of a null QPPs is performed where we identify significantly (de)activated voxels within the long QPP. To obtain these, we first constructed a null pattern by voxel-wise averaging across n (number of occurrences of the e.g. LCN DMLN QPP), randomly selected, segments that do not overlap with the segments corresponding to occurrences of the long (10s) QPP. This process is repeated 50 times resulting in 50 null QPPs.
Acknowledgements
References
Yousefi B, Keilholz S. Propagating patterns of intrinsic activity along macroscale gradients coordinate functional connections across the whole brain. Neuroimage. 2021 May 1;231:117827. doi: 10.1016/j.neuroimage.2021.117827. Epub 2021 Feb 5. PMID: 33549755; PMCID: PMC9073587.
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