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  4. Audio-Tactile and Peripersonal Space Processing Around the Trunk in Human Parietal and Temporal Cortex: An Intracranial EEG Study
 
research article

Audio-Tactile and Peripersonal Space Processing Around the Trunk in Human Parietal and Temporal Cortex: An Intracranial EEG Study

Bernasconi, Fosco  
•
Noel, Jean-Paul
•
Park, Hyeong Dong
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September 1, 2018
Cerebral Cortex

Interactions with the environment happen within one's peripersonal space (PPS)-the space surrounding the body. Studies in monkeys and humans have highlighted a multisensory distributed cortical network representing the PPS. However, knowledge about the temporal dynamics of PPS processing around the trunk is lacking. Here, we recorded intracranial electroencephalography (iEEG) in humans while administering tactile stimulation (T), approaching auditory stimuli (A), and the 2 combined (AT). To map PPS, tactile stimulation was delivered when the sound was far, intermediate, or close to the body. The 19% of the electrodes showed AT multisensory integration. Among those, 30% showed a PPS effect, a modulation of the response as a function of the distance between the sound and body. AT multisensory integration and PPS effects had similar spatiotemporal characteristics, with an early response (similar to 50 ms) in the insular cortex, and later responses (similar to 200 ms) in precentral and postcentral gyri. Superior temporal cortex showed a different response pattern with AT multisensory integration at similar to 100 ms without a PPS effect. These results, represent the first iEEG delineation of PPS processing in humans and show that PPS and multisensory integration happen at similar neural sites and time periods, suggesting that PPS representation is based on a spatial modulation of multisensory integration.

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Type
research article
DOI
10.1093/cercor/bhy156
Web of Science ID

WOS:000443545600025

Author(s)
Bernasconi, Fosco  
Noel, Jean-Paul
Park, Hyeong Dong
Faivre, Nathan  
Seeck, Margitta
Spinelli, Laurent
Schaller, Karl
Blanke, Olaf  
Serino, Andrea  
Date Issued

2018-09-01

Publisher

OXFORD UNIV PRESS INC

Published in
Cerebral Cortex
Volume

28

Issue

9

Start page

3385

End page

3397

Subjects

Neurosciences

•

Neurosciences & Neurology

•

insula

•

intracranial electroencephalography

•

multisensory

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peripersonal space

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posterior parietal cortex

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bodily self-consciousness

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ventral intraparietal area

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auditory association cortex

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multisensory integration

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body ownership

•

human brain

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audiotactile interaction

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posterior parietal

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looming signals

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premotor cortex

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LNCO  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/152437
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