Psychophysiological interaction (PPI) analysis with left SOG as the source region and with the ‘Near > Far’ contrast as the psychological factor.

<p>The source region in the left SOG is marked in red. (A) PPI activation in ‘match’ condition. Only the ventral stream (blue) showed significant context-dependent co-variations with the neural activity in the SOG. The coupling was stronger in the far space than in the near space. In order to give a clearer view of ventral cortical structures, the cerebellum was removed in the ventral view display. PPI analysis based on the neural activity in the left SOG (red) for a representative participants were shown. A posterior view is given, with the cerebellum removed. Mean corrected neural activity in the right inferior occipital gyrus, the left fusiform, the left inferior temporal gyrus and the left middle temporal gyrus is displayed as a function of mean corrected activity in left SOG (i.e., first principal component from a sphere of 4 mm radius) in the near space (blue dots and lines) and far space (red dots and lines) blocks. (B) PPI activation in ‘natural’ condition. Both the dorsal and ventral streams (blue) showed significant context-dependent co-variations with the neural activity in the left SOG. The coupling was stronger in the far space than in the near space. In order to give a clearer view of ventral cortical structures, the cerebellum was removed in the ventral view display. PPI analysis based on the neural activity in the left SOG (red) for a representative participants were shown. Mean corrected neural activity in the left inferior occipital gyrus, the right lingual, the left middle temporal gyrus, the left middle cingulate gyrus, the left precuneus, the left inferior frontal gyrus and the left precentral gyrus is displayed as a function of mean corrected activity in left SOG (i.e., first principal component from a sphere of 4 mm radius) in the near space (blue dots and lines) and far space (red dots and lines) blocks.