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The N400 Congruity Effect. (A) Grand average ERPs to initial presentations of congruous (solid line) and incongruous (dotted line) words in normal controls (left) and participants with FXTAS (right). (B) Topographical maps of the N400 congruity effect (incongruous-congruous words). FXTAS group showed reduced N400 congruity effect compared to the normal controls (p = 0.007).
