Shared Representation of Visual and Auditory Motion Directions in the Human Middle-Temporal Cortex

Rezk, Mohamed;Cattoir, Stephanie;Battal, Ceren;Occelli, Valeria;Collignon, Olivier;et.al.
(2020) Current Biology — Vol. 30, n° 12, p. 2289-2299 (2020)

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Abstract
The human occipito-temporal region hMT+/V5 is well known for processing visual motion direction. Here, we demonstrate that hMT+/V5 also represents the direction of auditory motion in a format partially aligned with the one used to code visual motion. We show that auditory and visual motion directions can be reliably de- coded in individually localized hMT+/V5 and that motion directions in one modality can be predicted from the activity patterns elicited by the other modality. Despite shared motion-direction information across the senses, vision and audition, however, overall produce opposite voxel-wise responses in hMT+/V5. Our results reveal a multifaced representation of multisensory motion signals in hMT+/V5 and have broader implications for our understanding of how we consider the division of sensory labor between brain regions dedicated to a specific perceptual function.
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Rezk, M., Cattoir, S., Battal, C., Occelli, V., Mattioni, S., & Collignon, O. (2020). Shared Representation of Visual and Auditory Motion Directions in the Human Middle-Temporal Cortex. Current Biology, 30(12), 2289-2299. https://doi.org/10.1016/j.cub.2020.04.039 (Original work published 2020)