Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2014-08-01
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| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2014.00533/full |
| _version_ | 1818148484027514880 |
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| author | Lucas M Marques Olivia M Lapenta Lotfi B Merabet Nadia eBolognini Paulo Sérgio Boggio |
| author_facet | Lucas M Marques Olivia M Lapenta Lotfi B Merabet Nadia eBolognini Paulo Sérgio Boggio |
| author_sort | Lucas M Marques |
| collection | DOAJ |
| description | 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 audio-visual 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, PPC may adjust the arrival of incoming audio and visual information to STS thereby enhancing their interaction in this latter area. |
| first_indexed | 2024-12-11T12:51:52Z |
| format | Article |
| id | doaj.art-ca46ba5df2eb4841bb609703803d3201 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-11T12:51:52Z |
| publishDate | 2014-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-ca46ba5df2eb4841bb609703803d32012022-12-22T01:06:41ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612014-08-01810.3389/fnhum.2014.00533101914Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulationLucas M Marques0Olivia M Lapenta1Lotfi B Merabet2Nadia eBolognini3Paulo Sérgio Boggio4Mackenzie Presbyterian UniversityMackenzie Presbyterian UniversityHarvard Medical SchoolUniversity of Milano-BicoccaMackenzie Presbyterian UniversityIn 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 audio-visual 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, PPC may adjust the arrival of incoming audio and visual information to STS thereby enhancing their interaction in this latter area.http://journal.frontiersin.org/Journal/10.3389/fnhum.2014.00533/fullSpeechtranscranial direct current stimulationparietal cortexmultisensory integrationMcGurk illusionsuperior temporal |
| spellingShingle | Lucas M Marques Olivia M Lapenta Lotfi B Merabet Nadia eBolognini Paulo Sérgio Boggio Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation Frontiers in Human Neuroscience Speech transcranial direct current stimulation parietal cortex multisensory integration McGurk illusion superior temporal |
| title | Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation |
| title_full | Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation |
| title_fullStr | Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation |
| title_full_unstemmed | Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation |
| title_short | Tuning and disrupting the brain – modulating the McGurk illusion with electrical stimulation |
| title_sort | tuning and disrupting the brain modulating the mcgurk illusion with electrical stimulation |
| topic | Speech transcranial direct current stimulation parietal cortex multisensory integration McGurk illusion superior temporal |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2014.00533/full |
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