| Literature DB >> 12798988 |
Emese Nagy1, Geoffrey F Potts, Katherine A Loveland.
Abstract
The effect of sex on neural mechanisms of auditory mismatch detection was examined using dense sensor array (128 channel) event-related potential recordings (ERPs). ERPs of 32 right-handed subjects (16 males) were recorded to frequent (85%, 880 Hz) and infrequent (15%, 1480 Hz) tones. There were no sex differences in mismatch negativity (80-180 ms), however, the fronto-central P2 (180-260 ms) was less positive in males (F=12.56, P<0.005) and the N2 (260-340 ms) was more negative in males (F=6.28, P<0.05). The increased negativity in males spanning the P2 and N2 may index a top-down process of attention bias towards novelty. This result supports the hypothesis of an adaptive, sexually dimorphic processing of novel events in humans.Entities:
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Year: 2003 PMID： 12798988 DOI： 10.1016/s0167-8760(03)00042-4
Source DB: PubMed Journal: Int J Psychophysiol ISSN： 0167-8760 Impact factor: 2.997