Charles Schroeder
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Cooperative Processing of Multisensory Cues in Auditory Cortex and Classic Multisensory Regions
Multiple Paper Presentation

Charles Schroeder

     Abstract ID Number: 39

Discovery of multisensory convergence in the putatively “unisensory” belt and parabelt regions of posterior auditory cortex (PAC) in primates, including humans, prompts a fundamental change in our thinking about multisensory processing. We used a battery of stimuli in combination with multielectrode recordings in monkeys to evaluate the laminar profile and timing of the response to each input type (auditory, somatosensory, visual, eye position) available in PAC, and compared these with the corresponding properties of inputs in the “classic” multisensory areas STP and VIP. Laminar profile analyses indicate that multisensory convergence uses both feedforward and feedback connections. Temporal analyses suggest that multisensory inputs from nearby objects are variably synchronized in different cortical areas. These cortical responses generate ERP components comparable to those recorded in humans. Our findings support the proposition that cortical analysis of complex multisensory events such as communication signals requires dynamical interactions between higher and lower order regions.

To be Presented at the Following Symposium:
Cellular and field potential studies of audio-visual integration in humans and monkey
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