“…While synchrony is clear within the current set of experiments, it was not possible to understand what the global signal synchronization means or whether it is causally related to social interaction behaviors. It is unclear whether there is an overt behavior that correlates with the synchronization at 0.1-1 Hz (Chan et al, 2015;He et al, 2018;Mateo et al, 2017;Mitra et al, 2018;Okun et al, 2018;Winder et al, 2017) , or if this reflects the ebb and flow of the whisking behavior and spread of signal out of the barrel cortex as has been observed previously (Ferezou et al, 2007;Jacobs and Frostig, 2017;Mohajerani et al, 2013) . Our setup necessitates that the mice be head-restrained in order for them to be imaged and positioned properly.…”