Fig. 1.

Hypothetical models of the effects of spatial listening on AC response functions. (A) During nonspatial listening AC responds in a predictably contralateral manner, where each hemisphere responds maximally to sounds originating in the contralateral hemifield (i.e., left hemisphere to (+) rightward ILDs, right hemisphere to (−) leftward ILDs) (15). When engaged in an active spatial listening task, cortical responses might exhibit (B) an overall increase in the BOLD signal or (C) increased sensitivity to specific stimulus features. Red lines correspond to right hemisphere, blue to left hemisphere.