Oct 01, 2014
12:00 PM
Seminar room 2204, Bldg. 149, Charlestown Navy Yard

Daniel Baldauf, PhD
Research Scientist,
McGovern Institute for Brain Research, MIT
How we attend to objects and their features that cannot be separated by location is not understood.We presented two temporally and spatially overlapping streams of objects, faces versus houses, and used magnetoencephalography and functional magnetic resonance imaging to separate neuronal responses to attended and unattended objects. Attention to faces versus houses enhanced the sensory responses in the fusiform face area (FFA) and parahippocampal place area (PPA), respectively. The increases in sensory responses were accompanied by induced gamma synchrony between the inferior frontal junction, IFJ, and either FFA or PPA, depending on which object was attended. The IFJ appeared to be the driver of the synchrony, as gamma phases were advanced by 20 ms in IFJ compared to FFA or PPA. Thus, the IFJ may direct the flow of visual processing during object-based attention, at least in part through coupled oscillations with specialized areas such as FFA and PPA.

Oct 27, 2014 to Oct 28, 2014
(All day)


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