Abstract
SUMMARY Perceptual integration and segregation of alternating tone sequences differing in frequency (ABA-ABA-...) depend on the frequency differences (ΔFs) between the A and B tones and the intertone intervals (ITIs) between successive tones. In the auditory cortex, tonotopic separation, forward suppression, and multisecond habituation have been considered as possible neural mechanisms of this perceptual phenomenon. These mechanisms, however, cannot completely account for van Noorden's perceptual boundary and the temporally continuous perception of auditory streaming. Here we examined the temporal changes of the functional network properties in the auditory cortex in response to tone sequences with different ΔFs and ITIs. Specifically, we recorded LFPs using microelectrode arrays from anesthetized rats and constructed the functional network based on phase synchrony in gamma-band oscillation. Consequently, the networks consisted of subnetworks highly correlated with the place code of frequency, that is, a tonotopic map, and the subnetwork selective to B tones lasted for a prolonged period at large ΔF. Such characteristic substructures of the functional network are a possible candidate for the neural basis of auditory stream segregation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEJ Transactions on Electronics, Information and Systems
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
