Audio-tactile and peripersonal space processing around the trunk in human parietal and temporal cortex: An intracranial EEG study

Fosco Bernasconi, Jean Paul Noel, Hyeong Dong Park, Nathan Faivre, Margitta Seeck, Laurent Spinelli, Karl Schaller, Olaf Blanke, Andrea Serino

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

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 (~50 ms) in the insular cortex, and later responses (~200 ms) in precentral and postcentral gyri. Superior temporal cortex showed a different response pattern with AT multisensory integration at ~100 ms without a PPS effect. These results, represent the first iEEG delineation of PPS processing in humansand 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.

Original languageEnglish
Pages (from-to)3385-3397
Number of pages13
JournalCerebral Cortex
Volume28
Issue number9
DOIs
Publication statusPublished - Sep 1 2018
Externally publishedYes

Keywords

  • Insula
  • Intracranial electroencephalography
  • Multisensory
  • Peripersonal space
  • Posterior parietal cortex

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Cellular and Molecular Neuroscience

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