Multisensory-driven facilitation within the peripersonal space is modulated by the expectations about stimulus location on the body.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
21 11 2022
21 11 2022
Historique:
received:
06
06
2022
accepted:
27
09
2022
entrez:
22
11
2022
pubmed:
23
11
2022
medline:
25
11
2022
Statut:
epublish
Résumé
Compelling evidence from human and non-human studies suggests that responses to multisensory events are fastened when stimuli occur within the space surrounding the bodily self (i.e., peripersonal space; PPS). However, some human studies did not find such effect. We propose that these dissonant voices might actually uncover a specific mechanism, modulating PPS boundaries according to sensory regularities. We exploited a visuo-tactile paradigm, wherein participants provided speeded responses to tactile stimuli and rated their perceived intensity while ignoring simultaneous visual stimuli, appearing near the stimulated hand (VTNear) or far from it (VTFar; near the non-stimulated hand). Tactile stimuli could be delivered only to one hand (unilateral task) or to both hands randomly (bilateral task). Results revealed that a space-dependent multisensory enhancement (i.e., faster responses and higher perceived intensity in VTNear than VTFar) was present when highly predictable tactile stimulation induced PPS to be circumscribed around the stimulated hand (unilateral task). Conversely, when stimulus location was unpredictable (bilateral task), participants showed a comparable multisensory enhancement in both bimodal conditions, suggesting a PPS widening to include both hands. We propose that the detection of environmental regularities actively shapes PPS boundaries, thus optimizing the detection and reaction to incoming sensory stimuli.
Identifiants
pubmed: 36414633
doi: 10.1038/s41598-022-21469-w
pii: 10.1038/s41598-022-21469-w
pmc: PMC9681840
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
20061Subventions
Organisme : Fundação Bial (Bial Foundation)
ID : 311/2020
Organisme : San Paolo foundation 2016 grant to F.G.
ID : CSTO165140
Informations de copyright
© 2022. The Author(s).
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