Gender differences in hemispheric asymmetry for face processing.
paper
Cited
Public
- Authors
- Proverbio, Alice M; Brignone, Valentina; Matarazzo, Silvia; Del Zotto, Marzia; Zani, Alberto
- Year
- 2006
- Journal
- BMC neuroscience
- PMID
- 16762056
- DOI
- 10.1186/1471-2202-7-44
- PMCID
- PMC1523199
BACKGROUND: Current cognitive neuroscience models predict a right-hemispheric dominance for face processing in humans. However, neuroimaging and electromagnetic data in the literature provide conflicting evidence of a right-sided brain asymmetry for decoding the structural properties of faces. The purpose of this study was to investigate whether this inconsistency might be due to gender differences in hemispheric asymmetry. RESULTS: In this study, event-related brain potentials (ERPs) were recorded in 40 healthy, strictly right-handed individuals (20 women and 20 men) while they observed infants' faces expressing a variety of emotions. Early face-sensitive P1 and N1 responses to neutral vs. affective expressions were measured over the occipital/temporal cortices, and the responses were analyzed according to viewer gender. Along with a strong right hemispheric dominance for men, the results showed a lack of asymmetry for face processing in the amplitude of the occipito-temporal N1 response in women to both neutral and affective faces. CONCLUSION: Men showed an asymmetric functioning of visual cortex while decoding faces and expressions, whereas women showed a more bilateral functioning. These results indicate the importance of gender effects in the lateralization of the occipito-temporal response during the processing of face identity, structure, familiarity, or affective content.
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| # | Section | Preview |
|---|---|---|
| 20 | Conclusion | Our study found a lesser degree of lateralization of brain functions related to face and expression⦠|
| 21 | Methods β Participants | 40 healthy individuals (20 women and 20 men) with normal or corrected-to-normal vision volunteeredβ¦ |
| 22 | Methods β Materials and procedures | Participants sat about 120 cm from a computer monitor in an acoustically and electrically shieldedβ¦ |
| 23 | Methods β Materials and procedures | The EEG was continuously recorded from 28 scalp electrodes mounted on an elastic cap. The electrodesβ¦ |
| 24 | Methods β Materials and procedures | Computerized rejection of artefacts was performed before averaging to discard epochs in which eyeβ¦ |
| 25 | Methods β Materials and procedures | ERP data of amplitude and latency were analyzed by means of 3- and 4-way repeated measure ANOVAs;β¦ |
| 26 | Authors' contributions | AMP conceived of the study, coordinated data acquisition and analysis, interpreted the data and⦠|
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