The scalp topography and waveforms in the current study are similar both to earlier findings that used the same face stimuli (Marinkovic and Halgren, 1998), and to other studies that used comparable stimuli (Herrmann et al., 2002, Eimer and Holmes, 2002, Gan et al., 2009). Studies have found significant amplitude differences in the P160 for fearful facial expressions only when comparing neutral and fearful expressions (Holmes et al., 2006), while another also found a significant amplitude increase for fearful but not for happy vs. neutral stimuli (Ashley et al., 2004). These results are not inconsistent with our findings, but their direct evaluation would require presentation of fearful and other high intensity emotional facial stimuli.
