Top-down control of cortical gamma-band communication via pulvinar induced phase shifts in the alpha rhythm
Fig 1
Schematic of model used in the simulations.
Two neocortical areas were uni-directionally connected via a feedforward connection. Both areas consisted of excitatory (RS) neurons and inhibitory (FS, LTS) neurons. Reciprocal connections existed between the excitatory and inhibitory populations within one area. Neurons of each cell type were also recurrently connected within each area. The input to the FS neurons was modulated by an alpha-band oscillatory drive from the pulvinar. The pulvinar neurons were not explicitly modeled. The effect of varying the relative alpha phase Δϕ on communication between the neocortical areas was tested.