Schwartz D M, Morris M D, Spydell J D, Ten Brink C, Grim M A, Schwartz J A
Department of Otorhinolaryngology, University of Pennsylvania Medical Center, Philadelphia.
Electroencephalogr Clin Neurophysiol. 1990 Nov-Dec;77(6):445-57. doi: 10.1016/0168-5597(90)90005-x.
Brain-stem auditory evoked responses (BAERs) were recorded both to rarefaction and condensation click stimuli in 92 normal hearers and 78 patients with varying degrees of cochlear hearing loss (N = 340 ears). Frequency distributions of rarefaction minus condensation (R - C) latency and amplitude differences revealed clinically significant polarity effects in a substantial percentage of the patients studied. Bivariate plots of R - C latency and amplitude differences versus average high frequency hearing loss (PTA 3) demonstrated that the magnitude of the R - C latency and amplitude differences also seemed to be influenced by degree of high frequency hearing loss. Results are discussed relative to the phase-locking properties of the afferent auditory nerve fibers and the possible electrodiagnostic consequences of recording the BAER either to alternating or condensation clicks.
在92名正常听力者和78名不同程度耳蜗性听力损失患者（共340耳）中记录了对疏波和密波短声刺激的脑干听觉诱发电位（BAERs）。疏波减去密波（R - C）潜伏期和幅度差异的频率分布显示，在相当比例的研究患者中存在具有临床意义的极性效应。R - C潜伏期和幅度差异与平均高频听力损失（PTA 3）的双变量图表明，R - C潜伏期和幅度差异的大小似乎也受高频听力损失程度的影响。本文结合传入听觉神经纤维的锁相特性以及记录BAER时采用交替短声或密波短声刺激可能产生的电诊断结果进行了讨论。
