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. 2019 Feb 27;13:77. doi: 10.3389/fnins.2019.00077

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Copyright © 2019 Alvarado, Fuentes-Santamaría, Gabaldón-Ull and Juiz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Line graphs depicting the absolute positive (colored lines) and negative (black lines) latency times (ms) of waves I, II, and IV, as a function of frequency in NE and E rats. At 3 months (A–C) in both NE and E animals, previous any noise exposure, the mean values for the absolute latencies in waves I, II, and IV were similar to those previously reported. At 6 and 12 months in the exposed rats these values were significantly longer at the highest frequencies for wave IV (F,I), but not for wave I (D,G) or II (E,H). In 18-month-old rats, a significant lengthening of latency times was detected in the exposed animals for waves I (J), II (K), and IV (L) also at the highest frequencies. PAL, Positive Absolute Latencies; NAL, Negative Absolute Latencies, ^∗p < 0.05, ^∗∗p < 0.01.