How does seeing help listening? Audiovisual integration in Auditory Cortex
Schedule
Thursday, December 2, 2021
16:00 UTC
Jennifer Bizley
University College London
Host: Multisensory Perception and Plasticity
Recording
Open recording
Event Information
Recording
Available
Host
Multisensory Perception and Plasticity
Duration
70 minutes
Abstract
Multisensory responses are ubiquitous in so-called unisensory cortex. However, despite their prevalence, we have very little understanding of what – if anything - they contribute to perception. In this talk I will focus on audio-visual integration in auditory cortex. Anatomical tracing studies highlight visual cortex as one source of visual input to auditory cortex. Using cortical cooling we test the hypothesis that these inputs support audiovisual integration in ferret auditory cortex. Behavioural studies in humans support the idea that visual stimuli can help listeners to parse an auditory scene. This effect is paralleled in single units in auditory cortex, where responses to a sound mixture can be determined by the timing of a visual stimulus such that sounds that are temporally coherent with a visual stimulus are preferentially represented. Our recent data therefore support the idea that one role for the early integration of auditory and visual signals in auditory cortex is to support auditory scene analysis, and that visual cortex plays a key role in this process.
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