title: Neural correlates of audiovisual speech processing in a second language.
abstract: Neuroimaging studies of audiovisual speech processing have exclusively addressed listeners' native language (L1). Yet, several behavioural studies now show that AV processing plays an important role in non-native (L2) speech perception. The current fMRI study measured brain activity during auditory, visual, audiovisual congruent and audiovisual incongruent utterances in L1 and L2. BOLD responses to congruent AV speech in the pSTS were stronger than in either unimodal condition in both L1 and L2. Yet no differences in AV processing were expressed according to the language background in this area. Instead, the regions in the bilateral occipital lobe had a stronger congruency effect on the BOLD response (congruent higher than incongruent) in L2 as compared to L1. According to these results, language background differences are predominantly expressed in these unimodal regions, whereas the pSTS is similarly involved in AV integration regardless of language dominance.
authors.affiliation: Dept. de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Spain.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Barrós-Loscertales
authors.forename: Noelia
authors.initials: N
authors.lastname: Ventura-Campos
authors.forename: Maya
authors.initials: M
authors.lastname: Visser
authors.forename: Agnès
authors.initials: A
authors.lastname: Alsius
authors.forename: Christophe
authors.initials: C
authors.lastname: Pallier
authors.forename: César
authors.initials: C
authors.lastname: Avila Rivera
authors.forename: Salvador
authors.initials: S
authors.lastname: Soto-Faraco
mesh_terms: D000328:Adult; D001307:Auditory Perception / Q000502:physiology*; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D019303:Multilingualism; D013067:Speech Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
keywords: A; AV; AVc; AVi; Audiovisual speech; B; Bilingualism; L1; L2; MSI; STG; V; audiovisual; audiovisual congruent; audiovisual incongruent; auditory; baseline; fMRI; multisensory interaction; native language; non-native language; pSTS; posterior superior temporal sulcus; superior temporal gyrus; visual