Direct Structural Connection between Auditory-temporal and Visual-occipital motion selective regions
(2019) European conference on visual perception (ECVP) — Location: Leuven, Belgium (25.August.2019)
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- Abstract
- Perceiving and integrating motion signals across sensory systems is a crucial perceptual skill for optimal interaction with a multisensory environment. In primates, including humans, the middle-temporal region (hereafter, hMT+/V5) specializes in processing visual motion signals, while the Planum Temporale (hereafter, PT) specializes for auditory motion processing. It has been hypothesized that these regions can communicate directly to achieve fast and optimal multisensory integration of motion signals. However, the existence of direct anatomical connections between these regions remains unexplored. We therefore evaluated the presence of anatomical connections between the hMT+/V5 and the PT in fifteen healthy individuals. Each participant was first involved in an auditory and visual motion localizer in order to define PT and hMT+/V5 functionally. Using diffusion imaging data and conducting probabilistic tractography, we reconstructed white matter tracts between individually defined PT and hMT+/V5. We found reliable connections between hMT+/V5 and PT in both hemispheres in 15 out of 15 individuals, suggesting the existence of a direct pathway between these visual and auditory selective regions. Our findings have important implications for the understanding of the multisensory nature of motion processing, as this connection might represent the structural scaffolding underlying the auditory and tactile responses observed in hMT+/V5.
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Gurtubay Antolin, A. (2019). Direct Structural Connection between Auditory-temporal and Visual-occipital motion selective regions. European conference on visual perception (ECVP), Leuven, Belgium. https://hdl.handle.net/2078.5/118483