Representation of non-auditory events in monkey auditory cortex
Multiple Paper Presentation
Michael Brosch
Institute of Neurobiology, Magdeburg
Abstract ID Number: 206 Last modified:
April 7, 2006
Presentation date: 06/18/2006 2:00 PM in Hamilton Building, McNeil Theatre
(View Schedule)
Abstract
Early auditory cortex is generally considered to be unimodal. Here we describe extensive cross-modal activation in the auditory cortex of two monkeys while they performed an auditory categorization task: monkeys were required to grasp a touch bar and hold it after a cue-light was turned on. This triggered a sequence of tones of variable frequencies. Monkeys had to indicate the occurrence of a falling frequency step in the sequence by releasing the touch bar. In primary auditory cortex and posterior belt areas we found neurons whose firing was transiently synchronized to the cue-light or to the touch or release of the bar. Such firing not seen or was modified when the monkeys did not initiate a trial after the cue-light was lit or when they performed a visual task. We speculate that the responses to non-auditory events were formed by the tight association between the auditory task and visual stimuli, hand movements, and tactile feedback about the proper placement of the hand on a touch bar during the long training period (> 100,000 trials) of the monkeys. The representation of non-auditory sensory modalities and movements in auditory cortex could accelerate and improve performance of subjects in highly demanding auditory tasks.
To be Presented at the Following Symposium:
multisensory processing in and near primary auditory cortex
Other papers in this Symposium: - Peter Lakatos
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Institute Monica N.
O'Connell
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Institute
Aimee
Mills
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Institute
George
Karmos
Inst. Psychology, Hungarian Acad. Sci., Budapest, Hungary
Charles Schroeder Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Institute Role of oscillations in multisensory enhancement of auditory processing - Troy Hackett
Dept. Psychology, Vanderbilt University John
Smiley
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Inst.
George
Karmos
Inst. Psychology, Hungarian Acad. Sci., Budapest, Hungary
Istvan
Ulbert
Inst. Psychology, Hungarian Acad. Sci., Budapest, Hungary
Peter
Lakatos
Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Inst.
Charles Schroeder Cognitive Neuroscience & Schizophrenia Program, Nathan Kline Inst. Sources of somatic sensory input to auditory cortex in monkeys - Asif Ghazanfar
Princeton University Face/voice integration in monkey auditory cortex
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