Connectivity hypotheses. (Top) During dichotic listening, sound responses are presumed to be largest in the AC contralateral to the ear stimulated, although the ipsilateral AC will be stimulated as well. We therefore used contralateral AC responses for tagging the connectivity patterns during lateralized auditory attention. (Bottom, Left) Hypothesis of feedback modulations of lateralized AC responses by the left vs. right IPS during dichotic attention task. (Bottom, Right) If the presumed "neglect model" holds true, phase locking between the left IPS and right AC during left-ear attention should be weaker than phase locking between the right IPS and left AC during right-ear attention.