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Parametric lesion probability maps at two example points in the parametric dimension, corresponding to two age groups (all the images are shown at z = 45 in MNI space, (a); in the younger age group (29–31 years, b) the lesion probability is very low throughout the brain, while in the older age group (59–61 years, c) the lesion probability is higher, especially in the periventricular regions.
