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EXPLORING HUMAN VISUAL ATTENTION IN AN MEG STUDY OF A SPATIAL CUEING PARADIGM USING A NOVEL ANCOVA DESIGN

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6 Author(s)
Pantazis, D. ; Signal & Image Process. Inst., Southern California Univ., Los Angeles, CA ; Simpson, G.V. ; Weber, D.L. ; Dale, C.L.
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Visual attention models postulate that relevant information is selectively extracted by differentially modulating neural activity in the visual cortex to control the response to target and distractor stimuli. To investigate attention bias mechanisms in the brain, we use general linear modeling of cortically constrained images of oscillatory alpha activity extracted from an MEG study of visual attention. By using a novel ANCOVA design, we create statistics that estimate the temporal evolution of attention effects on several cortical regions. We present evidence that the superior parietal lobe and temporal parietal junction have instrumental roles, respectively, in shifting and sustaining attention.

Published in:

Biomedical Imaging: From Nano to Macro, 2007. ISBI 2007. 4th IEEE International Symposium on

Date of Conference:

12-15 April 2007