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Neural correlates of visual and tactile path integration and their task related modulation
Self-motion induces sensory signals that allow to determine travel distance (path integration). For veridical path integration, one must distinguish self-generated from externally induced sensory signals. Predictive coding has been suggested to attenuate self-induced sensory responses, while task...
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| Autoren: | , , , , |
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| Format: | Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
Philipps-Universität Marburg
2023
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| Schlagworte: | |
| Online Zugang: | PDF-Volltext |
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| Zusammenfassung: | Self-motion induces sensory signals that allow to determine travel distance (path integration). For
veridical path integration, one must distinguish self-generated from externally induced sensory
signals. Predictive coding has been suggested to attenuate self-induced sensory responses, while
task relevance can reverse the attenuating effect of prediction. But how is self-motion processing
affected by prediction and task demands, and do effects generalize across senses? In this fMRI study,
we investigated visual and tactile self-motion processing and its modulation by task demands.
Visual stimuli simulated forward self-motion across a ground plane. Tactile self-motion stimuli were
delivered by airflow across the subjects’ forehead. In one task, subjects replicated a previously
observed distance (Reproduction/Active; high behavioral demand) of passive self-displacement
(Reproduction/Passive). In a second task, subjects travelled a self-chosen distance (Self/Active; low
behavioral demand) which was recorded and played back to them (Self/Passive). For both tasks and
sensory modalities, Active as compared to Passive trials showed enhancement in early visual areas
and suppression in higher order areas of the inferior parietal lobule (IPL). Contrasting high and low
demanding active trials yielded supramodal enhancement in the anterior insula. Suppression in the
IPL suggests this area to be a comparator of sensory self-motion signals and predictions thereof. |
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| Beschreibung: | Gefördert durch den Open-Access-Publikationsfonds der UB Marburg. |
| DOI: | 10.1038/s41598-023-36797-8 |