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. 2020 Dec 9;10:21526. doi: 10.1038/s41598-020-78371-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Changes in auditory cortical activity from initial to chronic CI use. (A) Aural preference for each response/child (dots) and mean (± 1 SE) data (bars) quantify the overall change between initial (early-onset: 10 responses in 7 children; late-onset: 3 responses in 3 children) and chronic (early-onset: 14 responses in 11 children; late-onset: 10 responses in 6 children) periods of CI use, indicating, in both groups, a tendency toward normal aural preference in the AC ipsilateral to the NH ear (p = 0.07) and maintained representation of the NH ear in the opposite cortex in both groups (p > 0.05). (B) Dipole changes with CI use are shown for each child, revealing a time-dependent reduction of responses stimulated by the NH ear in the ipsilateral cortex in the early-onset group only (p = 0.06). ACipsi-CI: Auditory cortex ipsilateral to the implanted ear; ACipsi-NH: Auditory cortex ipsilateral to the NH ear.