Behavioral Pure-Tone Threshold Shifts Caused by Tympanic Membrane Electrodes.
Behavioral Pure-Tone Threshold Shifts Caused by Tympanic Membrane Electrodes.
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DOI：
10.1097/aud.0000000000000275
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发表时间：
2016-07
期刊：
影响因子：
3.7
通讯作者：
Cone B
中科院分区：
文献类型：
--
作者：
Smith SB;Lichtenhan J;Cone B
确定鼓膜（TM）电极是否诱导行为纯音听阈偏移。测试组（n=18）和对照组（n=10）的纯音听阈（250-8000 Hz）测量两次。TM电极被放置在测试组中的第一和第二阈值测量之间，而对照组不接收电极。比较各组纯音听阈变化。在试验组中评价TM电极接触位置对阈值偏移的影响。TM电极显著增加了平均低频阈值，在250 Hz时为7.5 dB，在500 Hz时为4.2 dB，个别耳朵的偏移高达25 dB。此外，阈值偏移似乎在任何频率下都不会随TM电极接触位置而变化。使用TM电极和插入式耳机时会发生低频阈值偏移。这些发现与解释耳蜗电图对低频刺激的反应有关。
To determine if tympanic membrane (TM) electrodes induce behavioral pure tone threshold shifts. Pure tone thresholds (250–8000 Hz) were measured twice in test (n=18) and control (n=10) groups. TM electrodes were placed between first and second threshold measurements in the test group, whereas the control group did not receive electrodes. Pure tone threshold shifts were compared between groups. The effect of TM electrode contact location on threshold shifts was evaluated in the test group. TM electrodes significantly increased average low-frequency thresholds, 7.5 dB at 250 Hz and 4.2 dB at 500 Hz, and shifts were as large as 25 dB in individual ears. Also, threshold shifts did not appear to vary at any frequency with TM electrode contact location. Low-frequency threshold shifts occur when using TM electrodes and insert earphones. These findings are relevant to interpreting electrocochleographic responses to low-frequency stimuli.