Dynamics of large-scale cortical interactions at high gamma frequencies during word production: Event related causality (ERC) analysis of human electrocorticography (ECoG)

► High gamma causal interactions occur in large-scale cortical networks. ► Effective connectivity maps coincide with the functional topography of human cortex. ► Divergence/convergence of causal flows reveals functionally important network nodes. ► Effective connectivity maps may be useful for preoperative evaluation of patients.