Lehnhardt E, Battmer R D
Laryngol Rhinol Otol (Stuttg). 1979 Nov;58(11):822-6.
The fast brain stem response can be recorded even at the threshold; it informs on hearing in the high frequency range of greater than or equal to 2000 cps. Especially in those frequencies often the differentiation between sensorial and neural hearing impairment is of interest--f. e. controlling the pure tone threshold in noise: at sensorial hearing loss tones remain heard within noise of equal loudness unaltered, at neural hearing loss the tone vanishes in noise, e. g. the tone-intensity must be increased to make the tone arise again. This phenomenon known from subjective audiometry mentally can be transferred to the recording of acoustic evoked potentials and can be proved by the behaviour of latency of P6: at sensorial hearing loss the latency is prolonged (corresponding to minus 20 dB) but the response furthermore is recorded in the noise as well as at the click masked threshold; at neural hearing loss, however, the response can be recorded again with a click-intensity, which exceeds that of the noise clearly.
即使在阈值时也可记录到脑干快速反应；它反映大于或等于2000 cps的高频范围的听力情况。尤其在这些频率下，感觉性和神经性听力障碍之间的鉴别通常是有意义的——例如在噪声中控制纯音阈值：在感觉性听力损失时，在同等响度的噪声中音调仍能保持不变被听到，在神经性听力损失时，音调在噪声中消失，例如必须增加音调强度才能使音调再次出现。这种主观听力测定中已知的现象在心理上可转移到听觉诱发电位的记录中，并可通过P6潜伏期的表现得到证实：在感觉性听力损失时潜伏期延长（相当于-20 dB），但反应在噪声中以及在点击掩蔽阈值时也能被记录到；然而，在神经性听力损失时，用明显超过噪声强度的点击强度才能再次记录到反应。
