Affective valence of familiar faces modulates the P300 component.
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1
University of Ciego de Avila, Cuba
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2
Cognitive Neuroscience Department, Cuban Neuroscience Center, Cuba
Previous Event Related Potentials (ERPs) studies from our group suggest that familiar faces activate not only face specific neural areas but also structures related with emotional processing. The processing of emotional valence (i.e. pleasant and unpleasant) is crucial to adaptability social behavior. We aimed to study how the affective valence of faces modulates the temporal course of the ERPs and the possible relations between empathy and ERP amplitudes. Subjects were presented with faces of characters from a soap opera previously saw by them. The valence of these faces was measured using liker-type scale. ERPs were recording for this familiar faces randomly mixed with unfamiliar faces in an oddball paradigm. Familiar faces trials were classified as positive, negative or neutral for each subject in order to get three different infrequent waveforms, which were compared with infrequent unfamiliar averaged. All familiar faces elicited a prominent P3b, maximal over centro-parietal sites, with a latency of 500ms. Besides an additional component, an early P3 maximal over frontal sites, with a latency of 380 ms (Figure 1). The P3b component showed enhanced amplitudes in response to positive faces as compared to both neutral and negative faces. Moreover, negative faces evoked higher amplitudes than neutral ones. Interestingly, the P3b amplitude modulation is explained by empathy depending for the affective valence, however early P3 component is independent of valence and empathy. These results suggest that emotional–social information elicit fast and automatic assessments, in the other hand differences in the processing of valence are related with the reward values of the identity and personality characteristics.
Conference:
10th International Conference on Cognitive Neuroscience, Bodrum, Türkiye, 1 Sep - 5 Sep, 2008.
Presentation Type:
Poster Presentation
Topic:
Emotional Processing
Citation:
Fernández
T,
Quiñones
I,
Bobes
MA and
Lage
A
(2008). Affective valence of familiar faces modulates the P300 component..
Conference Abstract:
10th International Conference on Cognitive Neuroscience.
doi: 10.3389/conf.neuro.09.2009.01.216
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Received:
08 Dec 2008;
Published Online:
08 Dec 2008.
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Correspondence:
Thalia Fernández, University of Ciego de Avila, Ciego de Avila, Cuba, thalia@servidor.unam.mx