Browsing by Author "Ortega, Rodrigo"
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- ItemExogenous orienting of visual-spatial attention in ADHD children(2013) Ortega, Rodrigo; López Hernández, Vladimir; Carrasco, Ximena; Anllo-Vento, Lourdes; Aboitiz, Francisco
- ItemFrom neural signatures of emotional modulation to social cognition : individual differences in healthy volunteers and psychiatric participants(2014) Ibáñez, Agustín; Aguado, Jaume; Baez, Sandra; Huepe Artigas, David; López Hernández, Vladimir; Ortega, Rodrigo; Sigman, Mariano; Mikulan, Ezequiel; Lischinsky, Alicia; Torrente, Fernando; Cetkovich, Marcelo; Torralva, Teresa; Bekinschtein, Tristan; Manes, Facundo
- ItemTemporal dynamics of different levels of feature representation in working memory binding: An EEG and iEEG study(2016) Ortega, Rodrigo; López Hernández, Vladimir; Baglivo, Fabricio; Parra, Mario; Ibáñez, Agustín
- ItemVoluntary modulations of attention in a semantic auditory-visual matching Task: an ERP study(SOC BIOLGIA CHILE, 2008) Ortega, Rodrigo; Lopez, Vladimir; Aboitiz, FranciscoThe present study explores the neural correlates of voluntary modulations of attention in an auditory-visual matching task. Visual stimuli (a female or a male face) were preceded in close temporal proximity by auditory stimuli consisting of the Spanish word for "man" and "woman" ("hombre" or "mujer"). In 80% of the trials the gender of the two stimuli coincided. Participants were asked to mentally count the specific instances in which a female face appeared after hearing the word "man" (10 % of the trials). Our results show attention-related amplitude modulation of the early visual ERP components NI and anterior P2, but also amplitude modulations of (i) the N270 potential usually associated with conflict detection, (ii) a P300 wave related to infrequency, and (iii) an N400 potential related to semantic incongruence. The elicitation of these latter components varied according to task manipulations, evidencing the role of voluntary allocation of attention in fine-tuning cognitive processing, which includes basic processes like detection of infrequency or semantic incongruity often considered to be volition-independent.