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Figure 1. Region delimitation adopted in this study. The anterior cingulate gyrus appears shaded darker than the posterior cingulate region. The arrow of the left picture indicates the presence of a second cingulate sulcus delimiting a paracingulate gyrus that was not included in our region of interest. The arrow in the right picture points to an intralimbic sulcus within the cingulate gyrus. Note the large difference in the extent of the anterior cingulate gyrus in these two subjects.
