Beattie R C, Taggart L A
Department of Communicative Disorders, California State University, Long Beach.
Scand Audiol. 1987;16(3):147-52. doi: 10.3109/01050398709042169.
The effects of amplifier type (single-ended versus differential) and electrode location on early auditory evoked potentials were investigated in normally hearing subjects. Each subject was tested with six electrode combinations using 70 dB nHL clicks. One differential recording was made for each subject by placing the non-inverting (A+), inverting (A-), and common (C) electrodes on the vertex, ipsilateral neck, and contralateral neck, respectively. Five single-ended recordings were obtained from each subject. One electrode (positive) was situated on the vertex, whereas the second electrode (negative) was variously placed on (1) ipsilateral mastoid, (2) ipsilateral neck, (3) seventh cervical vertebra, (4) ipsilateral wrist, and (5) lower forehead. Because the vertex-lower forehead montage yielded identifiable responses in only one of 13 subjects, this condition was omitted from data analyses. No statistically significant latency or amplitude differences were observed among the remaining five electrode combinations for Waves I, III, or V. These data suggest that any of the five electrode combinations may be used for recording early auditory evoked potentials. Moreover, it is important to note that the single-ended recordings can yield auditory evoked potentials comparable to conventional differential recordings.
在听力正常的受试者中，研究了放大器类型（单端与差分）和电极位置对早期听觉诱发电位的影响。每个受试者使用70 dB nHL短声进行六种电极组合测试。通过将非反相（A +）、反相（A -）和公共（C）电极分别置于头顶、同侧颈部和对侧颈部，为每个受试者进行一次差分记录。从每个受试者获得五次单端记录。一个电极（正极）位于头顶，而第二个电极（负极）分别置于（1）同侧乳突、（2）同侧颈部、（3）第七颈椎、（4）同侧手腕和（5）下前额。由于在13名受试者中只有1名在头顶 - 下前额组合中产生了可识别的反应，因此在数据分析中省略了这种情况。对于波I、III或V，在其余五种电极组合之间未观察到统计学上显著的潜伏期或幅度差异。这些数据表明，五种电极组合中的任何一种都可用于记录早期听觉诱发电位。此外，需要注意的是，单端记录可以产生与传统差分记录相当的听觉诱发电位。
