range neural communication in the brain. 84 P300 responses are primarily the outcome of theta and delta EROs elicited during cognitive processing. 35 , 82 Theta oscillations peak earlier during the attentional and memory‐related aspects of the task and have a frontal focus, representing fronto‐limbic or cortico‐hippocampal interactions. 19 , 77 , 85 , 86 Delta oscillations peak at posterior regions and are involved with decision‐making and response selection aspects of the task and represent cortico‐cortical interactions. 19 , 77 , 86 , 87
