Rosenhamer H J, Holmkvist C
Scand Audiol. 1983;12(3):201-7. doi: 10.3109/01050398309076247.
Auditory brainstem responses to monaural clicks and to binaural clicks delivered with interaural time differences of 0.5 and 1 ms (delayed clicks in left ear) and interaural intensity differences (right ear minus left ear) of 0, +/- 10, +/- 20, and +/- 30 dB were recorded bilaterally in 7 normal subjects. Latencies of wave III and wave V were studied as functions of click intensity difference for each of the two time-of-onset differences. As the intensity difference was gradually varied from +30 to -30 dB, the latencies were seen to shift (with constant III--V interval) from those of a monaural right-ear (non-delayed clicks) response to those of a monaural left-ear (delayed clicks) response by 0.5 and 1 ms. In all subjects this shift occurred in the 20-dB interval between equal intensity and 20-dB lagging-click dominance, and almost always most of the shift took place in either of the two 10-dB subintervals. Occasionally double-peaked waves appeared in the 20 dB-interval. Binaural ABRs may become useful for diagnosis in patients with signs of brainstem disorder but with normal-hearing and normal audiometric findings including monaural ABR, as such patients have been found to shift their latencies more slowly with varying interaural intensity difference.
在7名正常受试者中，双侧记录了对单耳短声以及双耳短声的听觉脑干反应。双耳短声的双耳时间差为0.5和1毫秒（左耳延迟短声），双耳强度差（右耳减去左耳）为0、±10、±20和±30分贝。研究了在两种起始时间差情况下，波III和波V的潜伏期作为短声强度差的函数。当强度差从+30分贝逐渐变化到-30分贝时，可以看到潜伏期（III-V间期恒定）从单耳右耳（非延迟短声）反应的潜伏期转变为单耳左耳（延迟短声）反应的潜伏期，时间差分别为0.5和1毫秒。在所有受试者中，这种转变发生在等强度和延迟短声优势20分贝之间的20分贝区间内，并且几乎总是大部分转变发生在两个10分贝子区间中的一个。偶尔在20分贝区间会出现双峰波。双耳听觉脑干反应对于有脑干疾病体征但听力正常且包括单耳听觉脑干反应在内的听力测定结果正常的患者可能有助于诊断，因为已发现此类患者随着双耳强度差的变化，其潜伏期变化更慢。
