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Titolo:
Emotional expression boosts early visual processing of the face: ERP recording and its decomposition by independent component analysis
Autore:
Sato, W; Kochiyama, T; Yoshikawa, S; Matsumura, M;
Indirizzi:
Kyoto Univ, Dept Cognit Psychol Educ, Sakyo Ku, Kyoto 6068501, Japan KyotoUniv Kyoto Japan 6068501 chol Educ, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ, Dept Human & Environm Studies, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 m Studies, Sakyo Ku, Kyoto 6068501, Japan
Titolo Testata:
NEUROREPORT
fascicolo: 4, volume: 12, anno: 2001,
pagine: 709 - 714
SICI:
0959-4965(20010326)12:4<709:EEBEVP>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEURAL ACTIVATION; BLIND SEPARATION; HUMAN AMYGDALA; HUMAN BRAIN; ATTENTION; PERCEPTION; RESPONSES; JUDGMENTS; AROUSAL; CORTEX;
Keywords:
emotional expressions; event related potential (ERP); face recognition; independent component analysis (ICA);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Sato, W Kyoto Univ, Dept Cognit Psychol Educ, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 c, Sakyo Ku, Kyoto 6068501, Japan
Citazione:
W. Sato et al., "Emotional expression boosts early visual processing of the face: ERP recording and its decomposition by independent component analysis", NEUROREPORT, 12(4), 2001, pp. 709-714

Abstract

To investigate the hypothesis that early visual processing of stimuli might be boosted by signals of emotionality, we analyzed event related potentials (ERPs) of twelve right-handed normal subjects. Gray-scale still images of faces with emotional (fearful and happy) or neutral expressions were presented randomly while the subjects performed gender discrimination of the faces. The results demonstrated that the faces with emotion (both fear and happiness) elicited a larger negative peak at about 270 ms (N270) over the posterior temporal areas, covering a broad range of posterior visual areas. The result of independent component analysis (ICA) on the ERP data suggestedthat this posterior N270 had a synchronized positive activity at the frontal-midline electrode. These findings confirm that the emotional signal boosts early visual processing of the stimuli. This enhanced activity might be implemented by the amygdalar re-entrant projections. NeuroReport 12:709-714(C) 2001 Lippincott Williams & Wilkins.

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Documento generato il 25/01/20 alle ore 00:20:27