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. Author manuscript; available in PMC: 2011 Dec 1.
Published in final edited form as: Brain Lang. 2010 Aug 21;115(3):149–161. doi: 10.1016/j.bandl.2010.07.006

Figure 1.

Figure 1

Younger adults’ ERP responses to category targets (at left) and antonym targets (at right) are plotted for a representative sample of electrodes across the head (circled electrode locations shown on head icon). Negative voltage is plotted up in this and all subsequent figures. N400 responses at medial centro-posterior electrode sites (filled circles on head icon; sites include Midline Central, Parietal, and Occipital electrodes, and Left and Right Medial Central, Dorsal Central, Dorsal Parietal, and Medial Occipital pairs) are larger for incongruent category and antonym targets (dotted lines) than for wholly expected ones (solid lines), and are intermediate for low typicality category targets (dashed line). Low typicality targets also elicited a sustained positivity (500–900 ms) at prefrontal electrode sites (filled triangles on head icon; sites include the Midline Prefrontal electrode and Left and Right Medial and Lateral Prefrontal pairs).