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Age-related alterations in visual networks shown with identical thresholding as in the previous images. The younger age groups have more power in their signal sources in general. The difference is smaller between the two older age groups. V5 and Vcran fuse in the older age group into a single large source. IPL, inferior parietal lobule; MTG, medial temporal gyrus; Ling g, lingual gyrus; V1, primary; V2, secondary; V3, tertiary, and, V4, quadrature visual cortex, respectively.
