The Study Of The Visual Prefrontal Parietal Network Using The Granger Causality Analyse

Our goal of this paper is to construct the brain functional network of the visualspatial selectivity attention and working memory using the Granger Causal Connectivityand find the difference of the functional network of the two tasks.In visual spatial selectivity attention, we extracted occipital lobe,parietal lobe andfrontal lobe as our area-of-interests. The time window of the tree areas is occipitallobe(80-130ms), parietal lobe(150-200ms) and frontal lobe(200-300ms). The result ofthe network shows that on attented condition, there exit a top-down modulating signalfrom the frontal and parietal lobe to the occipital lobe. While on unattented condition,the top-down modulating signal from frontal lobe to occipital lobe disappeared.In working memory, we choose left/right occipital lobe, parietal lobe and frontallobe as our area-of-interests. The result of the working memory network shows thatthere exits top-down modulating signal from frontal lobe and parietal lobe to occipitallobe when the stimuli appears at the right visual field. But there is no top-down signalfrom frontal lobe to occipital lobe when the stimuli appear at the left visual field.The network of the two cognitive processing share the common circuits—frontalnetwork. But the parietal lobe play a more important role than the frontal lobe in visualspatial selectivity attention, while the frontal lobe play a more important role than theparietal lobe in working memory.