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. 2022 Sep 8;22:597. doi: 10.1186/s12888-022-04208-3

Fig. 2.

Fig. 2

ERPs comparing OCD groups H and L and controls. Grand average ERP waveforms to correctly detected first and second presentations of the words for the OCD group H (n = 8), group L (n = 8) and the normal controls (n = 12) at F3, F4, C3, C4, P3, and P4. Group H showed early old/new effect (ca. 250–500 ms) and partially late old/new effect only over the left hemisphere in contrast to controls. Significant early and late old/new difference can be observed for the whole recording epoch between group L and the controls. FP = first presentation, SP = second presentation