DOI: 10.1152/jn.2000.83.5.2708. Sound-Induced Synchronization of Neural Activity Between and Within Three Auditory Cortical Areas

Sound-Induced Synchronization of Neural Activity Between and Within Three Auditory Cortical Areas

10.1152/jn.2000.83.5.2708

Crossref journal-article

American Physiological Society

Journal of Neurophysiology (24)

Abstract

Neural synchrony within and between auditory cortical fields is evaluated with respect to its potential role in feature binding and in the coding of tone and noise sound pressure level. Simultaneous recordings were made in 24 cats with either two electrodes in primary auditory cortex (AI) and one in anterior auditory field (AAF) or one electrode each in AI, AAF, and secondary auditory cortex. Cross-correlograms (CCHs) for 1-ms binwidth were calculated for tone pips, noise bursts, and silence (i.e., poststimulus) as a function of intensity level. Across stimuli and intensity levels the total percentage of significant stimulus onset CCHs was 62% and that of significant poststimulus CCHs was 58% of 1,868 pairs calculated for each condition. The cross-correlation coefficient to stimulus onsets was higher for single-electrode pairs than for dual-electrode pairs and higher for noise bursts compared with tone pips. The onset correlation for single-electrode pairs was only marginally larger than the poststimulus correlation. For pairs from electrodes across area boundaries, the onset correlations were a factor 3–4 higher than the poststimulus correlations. The within-AI dual-electrode peak correlation was higher than that across areas, especially for spontaneous conditions. Correlation strengths for between area pairs were independent of the difference in characteristic frequency (CF), thereby providing a mechanism of feature binding for broadband sounds. For noise-burst stimulation, the onset correlation for between area pairs was independent of stimulus intensity regardless the difference in CF. In contrast, for tone-pip stimulation a significant dependence on intensity level of the peak correlation strength was found for pairs involving AI and/or AAF with CF difference less than one octave. Across all areas, driven rate, between-area peak correlation strength, or a combination of the two did not predict stimulus intensity. However, between-area peak correlation strength performs better than firing rate to decide if a stimulus is present or absent.

Bibliography

Eggermont, J. J. (2000). Sound-Induced Synchronization of Neural Activity Between and Within Three Auditory Cortical Areas. Journal of Neurophysiology, 83(5), 2708â2722.

Authors 1

Jos J. Eggermont (first)

References 32 Referenced 70

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10.1007/BF00230526

Dates

Type	When
Created	7 years, 8 months ago (Dec. 21, 2017, 8:44 a.m.)
Deposited	5 years, 11 months ago (Sept. 9, 2019, 12:19 a.m.)
Indexed	2 days, 15 hours ago (Sept. 2, 2025, 6:51 a.m.)
Issued	25 years, 4 months ago (May 1, 2000)
Published	25 years, 4 months ago (May 1, 2000)
Published Print	25 years, 4 months ago (May 1, 2000)

Funders 0

None

BibTeX

@article{Eggermont_2000, title={Sound-Induced Synchronization of Neural Activity Between and Within Three Auditory Cortical Areas}, volume={83}, ISSN={1522-1598}, url={http://dx.doi.org/10.1152/jn.2000.83.5.2708}, DOI={10.1152/jn.2000.83.5.2708}, number={5}, journal={Journal of Neurophysiology}, publisher={American Physiological Society}, author={Eggermont, Jos J.}, year={2000}, month=may, pages={2708–2722} }

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