| Full text | |
| Author(s): |
Marques, Lucas Murrins
[1]
;
Lapenta, Olivia Morgan
[2]
;
Merabet, Lotfi B.
[3]
;
Bolognini, Nadia
[4]
;
Boggio, Paulo Sergio
[5]
Total Authors: 5
|
| Affiliation: | [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
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | FRONTIERS IN HUMAN NEUROSCIENCE; v. 8, AUG 4 2014. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 12/24696-1 - IMPORTANCE OF THE CORTICAL MOTOR NETWORK IN HUMAN MOVEMENT PERCEPTION |
| Grantee: | Olivia Morgan Lapenta |
| Support Opportunities: | Scholarships in Brazil - Doctorate |