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. 2017 Jul 6;7:4772. doi: 10.1038/s41598-017-05118-1

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© The Author(s) 2017

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Visual-auditory receptive field register increases with cross-modal exposure. (A) The classically-defined visual and auditory RFs of a representative neuron from a normally reared animal are shown at the top, with the visual (solid line) and auditory (dashed line) spatial response profiles shown below (y-axis = mean # impulses/response, normalized by maximum). Note the good register between the RFs using either metric. (B) However, this cross-modal RF register was very poor in most neurons of noise-reared animals during baseline tests, and is illustrated by the exemplar. (C) Poor cross-modal RF register remained evident even after 6 months of subsequent housing in the normal environment (NE-6). (D1) The poor RF registers remained even after an additional 6 months in the normal housing condition (NE-12). (D2) However, animals given weekly cross-modal exposure sessions (VA trained) over the same period showed a significant improvement in RF register. (E, F and G) Bar graphs summarize the average size (diameter) of the visual and auditory RFs in the population, and the t-scores (higher = greater RF misalignment, see text) in the five conditions. Error bars indicate SEM, ns = non-significant. Other conventions are the same as in previous figures.