a 4-fold finer grid than the effective resolution. The entire pipeline of this analysis is described here: https://layerfmri.com/analysispipeline. Cortical ‘columnar’ structures were also determined in LAYNII’s LN_3DCOLUMN program with the following algorithm: For each voxel, the next closest (Euclidean distance) voxel in each other layer is determined. This group of voxels is considered a ‘columnar’ structure. This means that every voxel has a unique column assignment. For more information on the algorithm see here: https://layerfmri.com/columns. Note that the terminology of ‘columns’ refers to the geometric columnar shape of fMRI voxel groups. It does not necessarily refer to groups of neurons with the identical receptive field (a.k.a. hypercolumn, macro column, functional column, cortical module, motion columns (Zimmermann et al. 2011)).
