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Antero-Posterior vs. Lateral Vestibular Input Processing in Human Visual Cortex.

Authors
  • Aedo-Jury, Felipe1, 2
  • Cottereau, Benoit R1, 2
  • Celebrini, Simona1, 2
  • Séverac Cauquil, Alexandra1, 2
  • 1 Centre de Recherche Cerveau et Cognition, Université Touloue III Paul Sabatier, Toulouse, France. , (France)
  • 2 Centre National de la Recherche Scientifique, Toulouse, France. , (France)
Type
Published Article
Journal
Frontiers in Integrative Neuroscience
Publisher
Frontiers Media SA
Publication Date
Jan 01, 2020
Volume
14
Pages
43–43
Identifiers
DOI: 10.3389/fnint.2020.00043
PMID: 32848650
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Visuo-vestibular integration is crucial for locomotion, yet the cortical mechanisms involved remain poorly understood. We combined binaural monopolar galvanic vestibular stimulation (GVS) and functional magnetic resonance imaging (fMRI) to characterize the cortical networks activated during antero-posterior and lateral stimulations in humans. We focused on functional areas that selectively respond to egomotion-consistent optic flow patterns: the human middle temporal complex (hMT+), V6, the ventral intraparietal (VIP) area, the cingulate sulcus visual (CSv) area and the posterior insular cortex (PIC). Areas hMT+, CSv, and PIC were equivalently responsive during lateral and antero-posterior GVS while areas VIP and V6 were highly activated during antero-posterior GVS, but remained silent during lateral GVS. Using psychophysiological interaction (PPI) analyses, we confirmed that a cortical network including areas V6 and VIP is engaged during antero-posterior GVS. Our results suggest that V6 and VIP play a specific role in processing multisensory signals specific to locomotion during navigation. Copyright © 2020 Aedo-Jury, Cottereau, Celebrini and Séverac Cauquil.

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