Poster D13, Monday, March 27, 8:00 – 10:00 am, Pacific Concourse
Dynamic coupling between the anterior cingulate and occipital alpha power during willed attentional control.
Jesse Bengson1,3, Xiaoke Zhang2, George Mangun3; 1Sonoma State University, 2University of Delaware, 3University of California-Davis
Little is known concerning the control of attention in response to internal decision making processes in the absence of clear informative external cues: a cognitive operation that we refer to as willed attentional control. Only recently has it been established that attention can be controlled by a purely voluntary decisional process and only a few studies have examined the neural processes that underpin willed attentional control. In the present study, we examined the electrophysiological and anatomical sites of willed attentional control using combined fMRI and EEG recordings. Our results indicate that willed attentional control evokes a momentary 400ms reduction in alpha power recorded over the occipital cortex just prior to the canonical deployment of attention-induced alpha lateralization. Furthermore, this alpha reduction specifically and significantly interacts with decision induced activation of the Anterior Cingulate. This pattern suggests that willed attentional control involves a dynamic interplay between the Anterior Cingulate activity and visual-cortical sensitivity, as indexed by a reduction in occipital alpha power.
Topic Area: ATTENTION: Spatial