“…We did not test connectivity between superficial V1 layers and deeper layers of higher areas, as these connections are known to relate to both feedback and feedforward processing (Maunsell & van Essen, 1983;Rockland & Virga, 1989). Despite, the fact that the UHF imaging resolution does not support one-to-one mapping between MRIdefined cortical depths and cyto-architectonically defined layers, Figure 1A provides a framework of feedback vs. feedforward connections across superficial, middle and deeper cortical depths, as proposed and tested by previous UHF imaging studies (e.g., Huber et al, 2017;Kok et al, 2016;Moerel, Yacoub, Gulban, Lage-Castellanos, & De Martino, 2020;Sharoh et al, 2019).…”