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. 2017 Jul 20;7:5959. doi: 10.1038/s41598-017-06477-5

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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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HFB power during pre-picture and picture intervals. (A) Averaged HFB power in −0.5 s to 1.5 s from the picture onset (irrespective of the RT) for the high-expected condition (top panel) and the low-expected condition (bottom panel). The HFB power in each trial was relative to the baseline (0.5 s before sentence onset). Each row shows the HFB power in a contact. X-axis is time from onset of the picture. Y-axis is the contact number (see Table 1). (B) Map of contacts corresponding to (A) in a glass hippocampus. Contacts 5 and 6 were located in the right hippocampus, but are shown in the left glass hippocampus for illustration. (C) Average HFB power increase relative to the baseline during the pre-picture interval (0.5 s gap between the offset of the last word from the sentence and the picture onset) and picture interval (0.2 s from onset of the stimuli to RT). The HFB power during the picture interval was more than the power during the pre-picture interval (**P < 0.001). During the pre-picture interval HFB power was more in the high-expected condition than in the low-expected condition (*P < 0.05). The error-bars show the standard deviations and n.s. denotes not significant.