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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Tuning and disrupting the brain-modulating the McGurk illusion with electrical stimulation

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Autor(es):
Marques, Lucas Murrins [1] ; Lapenta, Olivia Morgan [2] ; Merabet, Lotfi B. [3] ; Bolognini, Nadia [4] ; Boggio, Paulo Sergio [5]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Prebiteriana Mackenzie. Ctr Hlth & Biol Sci
[2] Univ Prebiteriana Mackenzie. Ctr Hlth & Biol Sci
[3] Harvard Univ. Massachusetts Eye & Ear Infirm
[4] Univ Milano Bicocca. Dept Psychol
[5] Univ Prebiteriana Mackenzie. Ctr Hlth & Biol Sci
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: FRONTIERS IN HUMAN NEUROSCIENCE; v. 8, AUG 4 2014.
Citações Web of Science: 0
Resumo

In the so-called McGurk illusion, when the synchronized presentation of the visual stimulus /ga/ is paired with the auditory stimulus /ba/, people in general hear it as /da/. Multisensory integration processing underlying this illusion seems to occur within the Superior Temporal Sulcus (STS). Herein, we present evidence demonstrating that bilateral cathodal transcranial direct current stimulation (tDCS) of this area can decrease the McGurk illusion-type responses. Additionally, we show that the manipulation of this audiovisual integrated output occurs irrespective of the number of eye fixations on the mouth of the speaker. Bilateral anodal tDCS of the Parietal Cortex also modulates the illusion, but in the opposite manner, inducing more illusion-type responses. This is the first demonstration of using non-invasive brain stimulation to modulate multisensory speech perception in an illusory context (i.e., both increasing and decreasing illusion type responses to a verbal audio-visual integration task). These findings provide clear evidence that both the superior temporal and parietal areas contribute to multisensory integration processing related to speech perception. Specifically, STS seems fundamental for the temporal synchronization and integration of auditory and visual inputs. For its part, posterior parietal cortex (PPC) may adjust the arrival of incoming audio and visual information to STS thereby enhancing their interaction in this latter area. (AU)

Processo FAPESP: 12/24696-1 - A importância da rede cortical motora na percepção de movimentos humanos
Beneficiário:Olivia Morgan Lapenta
Linha de fomento: Bolsas no Brasil - Doutorado