Fig. 2

Source localization of the magnetic resonance (MR) data signal of SD (from [12]). Color code: time from onset, locations showing the first MR signals of SD are coded in red, later times are coded by green and blue (see color scale to the right). Signals from the first 975 seconds were not recorded because the migraine attack was triggered outside the MR imaging facility. a The data on folded right posterior pole hemispheric cortex; b the same data on inflated cortical surface; c and d the same data shown on the entire hemisphere from posterior-medial view (oblique forward facing), folded and inflated, respectively. As described in the original study [12], MR data were not acquired from the extreme posterior tip of the occipital pole (rearmost portion). e A fully flattened view of the cortical surface. The aura-related changes are localized wave segments. Note that in the flattened cortex was cut along the steep sulcus calcarine to avoid large area distortions induced by the flattening process. The colored border to the left is the cut edge that should be considered being connected such that the color match up as seen in b and d. Copyright (2001) National Academy of Sciences, USA [12]