Comacchio F, Grandori F, Magnavita V, Martini A
Institute of Otorhinolaryngology, University of Padua, Italy.
Scand Audiol Suppl. 1988;30:165-72.
Topographic brain mapping of auditory middle latency evoked responses (MLR) were obtained from 20 subjects (10 males and 10 females), all right-handed and with normal pure tone audiograms. Clicks with alternative polarity, with a rate of 7.7/sec. were delivered at an intensity of 75 dB HL monoaurally to both ears. Responses from 21 channels were amplified and band-pass filtered (3-150). All the surface maps were analyzed with a Bio-Logic Brain Atlas III system. MLR maps obtained show a quite small intrasubjective variability at the latencies of the principal components Na and Pa. The grand averages of MLR maps at the corresponding latencies in males and females were compared each other. All the entire temporal window has been segmented into some subepochs, showing similar spatial characteristics of the maps, like location of maxima and minima and, overall, shape.
对20名受试者（10名男性和10名女性）进行了听觉中潜伏期诱发反应（MLR）的脑地形图绘制，所有受试者均为右利手且纯音听力图正常。以7.7次/秒的速率交替极性发出咔嗒声，强度为75 dB HL，单耳分别刺激双耳。来自21个通道的反应被放大并进行带通滤波（3 - 150）。所有表面图均使用Bio - Logic Brain Atlas III系统进行分析。所获得的MLR图显示，在主要成分Na和Pa的潜伏期，个体内变异性相当小。比较了男性和女性在相应潜伏期的MLR图的总体平均值。整个时间窗被分割为若干子时段，各子时段的图显示出相似的空间特征，如最大值和最小值的位置，以及整体形状。
