Files

No attached file found for this publication.

Details

Authors
Show more
Abstract
hMT+/V5, a region long thought to specialize in visual motion, also responds to auditory motion in sighted and even more so in congenitally blind people. The mechanisms behind auditory motion information transfer to the "visual" motion area in sighted and congenitally blind individuals remain unknown. Our study aims to characterize layer-dependent activity to visual and auditory motion in hMT+/V5 and Planum Temporale (hPT) of blind and sighted individuals using ultra-high-field fMRI (7T) coupled with BOLD and VASO submillimeter resolution acquisition. Our objective is to define the feedback or feedforward nature of information exchange in this audio- visual motion selective network and to explore how these connections reorganize due to visual deprivation. Congenitally blind and sighted participants processed horizontal and vertical motion stimuli presented in vision (in the sighted group) and audition (in both groups). Preliminary findings from a subset of participants (3 per group) suggest prevalent visual feedforward activity within hMT+/V5 for sighted participants and a similar feedforward activity for auditory input among blind individuals. Further analysis will validate these findings and explore directional motion encoding across layers, modalities and motion areas in both groups. This, in turn, will broaden our understanding of the feed-back and feed-forward mechanisms that drive cross-modal inputs modulated by in-born sensory deprivation.
Affiliations

Citations

  • APA
  • Chicago
  • FWB

Barilari, M., Matuszewski, J., Gau, R., Giraudet, E., Van baelen, M., Sherif, S., Huber, R., & Collignon, O. (2024). Characterizing layer-dependent activity to visual and auditory motion in hMT+/V5 of blind and sighted individuals using ultra-high-field fMRI (7T). Young Researcher Day - IONS, Bruxelles - Belgium. https://hdl.handle.net/2078.5/239792