Temporal coherence structure rapidly shapes neuronal interactions

Kai Lu, Yanbo Xu, Pingbo Yin, Andrew J. Oxenham, Jonathan B. Fritz and Shihab A. Shamma ()
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Kai Lu: Institute for Systems Research, University of Maryland
Yanbo Xu: Institute for Systems Research, University of Maryland
Pingbo Yin: Institute for Systems Research, University of Maryland
Andrew J. Oxenham: University of Minnesota
Jonathan B. Fritz: Institute for Systems Research, University of Maryland
Shihab A. Shamma: Institute for Systems Research, University of Maryland

Nature Communications, 2017, vol. 8, issue 1, 1-12

Abstract: Abstract Perception of segregated sources is essential in navigating cluttered acoustic environments. A basic mechanism to implement this process is the temporal coherence principle. It postulates that a signal is perceived as emitted from a single source only when all of its features are temporally modulated coherently, causing them to bind perceptually. Here we report on neural correlates of this process as rapidly reshaped interactions in primary auditory cortex, measured in three different ways: as changes in response rates, as adaptations of spectrotemporal receptive fields following stimulation by temporally coherent and incoherent tone sequences, and as changes in spiking correlations during the tone sequences. Responses, sensitivity and presumed connectivity were rapidly enhanced by synchronous stimuli, and suppressed by alternating (asynchronous) sounds, but only when the animals engaged in task performance and were attentive to the stimuli. Temporal coherence and attention are therefore both important factors in auditory scene analysis.

Date: 2017
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DOI: 10.1038/ncomms13900

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