|
Neural mechanisms and functional significance of multisensory convergence in early auditory cortical processing
Multiple Paper Presentation
Charles E. Schroeder
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Institute and Department of Neuroscience, Albert Einstein College of Medicine
John F.
Smiley
Program in Cognitive Neuroscience and Schizophrenia,Nathan Kline Institute
Peter
Lakatos
Program in Cognitive Neuroscience and Schizophrenia,Nathan Kline Institute
Tammy
McGinnis
Program in Cognitive Neuroscience and Schizophrenia,Nathan Kline Institute
M. Noelle
O'Connell
Program in Cognitive Neuroscience and Schizophrenia,Nathan Kline Institute
Troy A. Hackett
Hearing/Speech Sciences,Vanderbilt University Abstract ID Number: 124
Abstract
Recently identified multisensory convergence zones in posterior auditory cortex (PAC) appear common to monkeys and humans. Evidence from neural ensemble recordings in monkeys indicates that somatosensory and visual inputs to auditory cortex utilize both feedforward and "associative" (feedback/lateral) projections. These data provide an informative comparison with findings in classic multisensory areas VIP and STP. More detailed (single unit and multiunit cluster) studies of somatosensory input to PAC in anesthetized monkeys show that, while there are multiple submodalities of somatosensory input, including proprioception and vibration, the dominant input is a cutaneous representation of the head and neck. Additional recordings in behaving monkeys reveal that eye position modulates auditory processing in PAC, including A1. Collectively, our findings appear to align with the proposed spatial functions of the PAC, and they suggest that the heteromodal enhancement of the salience and accuracy of auditory localization begins at least this early in auditory processing.
To be Presented at the Following Symposium:
Contributions of Feedforward, Feedback and Lateral projections to Multisensory Convergence and Integration.
Other papers in this Symposium:
|
Top