Listening beyond seeing: Event-related potentials to audiovisual processing in visual narrative

Autor(es)

Manfredi, Mirella ^[1] ; Cohn, Neil ^[2] ; Andreoli, Mariana De Araujo ^[1] ; Boggio, Paulo Sergio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Prebiteriana Mackenzie, Ctr Biol Sci & Hlth, Social & Cognit Neurosci Lab, Rua Piaui 181, BR-01241001 Sao Paulo - Brazil

^[2] Tilburg Univ, Tilburg Ctr Cognit & Commun, Tilburg - Netherlands

• Tipo de documento: Artigo Científico
• Fonte: BRAIN AND LANGUAGE; v. 185, p. 1-8, OCT 2018.
• Citações Web of Science: 1

Resumo

Every day we integrate meaningful information coming from different sensory modalities, and previous work has debated whether conceptual knowledge is represented in modality-specific neural stores specialized for specific types of information, and/or in an amodal, shared system. In the current study, we investigated semantic processing through a cross-modal paradigm which asked whether auditory semantic processing could be modulated by the constraints of context built up across a meaningful visual narrative sequence. We recorded event-related brain potentials (ERPs) to auditory words and sounds associated to events in visual narratives-i.e., seeing images of someone spitting while hearing either a word (Spitting!) or a sound (the sound of spitting)-which were either semantically congruent or incongruent with the climactic visual event. Our results showed that both incongruent sounds and words evoked an N400 effect, however, the distribution of the N400 effect to words (centro-parietal) differed from that of sounds (frontal). In addition, words had an earlier latency N400 than sounds. Despite these differences, a sustained late frontal negativity followed the N400s and did not differ between modalities. These results support the idea that semantic memory balances a distributed cortical network accessible from multiple modalities, yet also engages amodal processing insensitive to specific modalities. (AU)

• Processo FAPESP: 15/00553-5 - Processamento semântico da informação audiovisual em autismo: uma investigação eletrofisiológica
• Beneficiário: Mirella Manfredi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado