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. 2014 Mar 20;8:25. doi: 10.3389/fncir.2014.00025

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Copyright © 2014 Lou, Luo, Zhang, Tao, Chen, Zhou and Xiong.

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) or licensor 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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Membrane potential characteristics of A1 neurons under two groups of stimulation. (A) Averaged membrane potential from 13 recorded neurons (left: sound only group; right: paired VTA-sound group). Thick black bar indicates the sound stimulation. Scale bar: 1 mV/10ms. (B) The duration of sound-evoked EPSP became shorter when VTA was activated (sound only: 46.5 ± 23.1 ms; paired VTA-sound: 23.2 ± 14.2 ms, **p < 0.01, paired t-test, n = 13). (C) The peak latency showed no significant difference between two stimulation groups (sound only: 15.1 ± 3.3 ms; paired VTA-sound: 14.8 ± 3 ms, p = 0.43, paired t-test, n = 13). (D) The amplitude of evoked EPSP (sound only: 9.4 ± 2.6 mV; paired VTA-sound: 9.8 ± 1.8 mV, p = 0.5, paired t-test, n = 13) also did not change significantly. (E) The membrane potentials before and after the electric stimulation were measured and no significant difference was found (200 ms window; before: -60.2 ± 6.8 mV; after: -60.1 ± 6.2 mV, p = 0.78, paired t-test, n = 13; filled triangle: sound-only stimulation; filled square: paired VTA-sound stimulation).