Henry K R
Department of Psychology, University of California, Davis 95616.
Hear Res. 1991 Nov;56(1-2):239-45. doi: 10.1016/0378-5955(91)90174-8.
Forward masking can either decrease or increase the response to a subsequent stimulus. In the gerbil, frequency-intensity domains of the maskers that decrease the amplitude of the compound action potential (CAP) can be plotted as the sharply defined CAP tuning curve (TC). Regions were also found over which masking increases (enhances) the amplitude of the CAP. Center-frequency (CF) enhancement domains were found in approximately 2/3 of the animals tested, in response to maskers having frequencies very near that of the probe stimulus, at levels ranging from below the CAP detection threshold to just below the tip threshold of the TC. Approximately 2/3 of the animals showing CF enhancement also displayed low-frequency (LF) enhancement, in response to a domain which borders the low-frequency tail of the TC.
前掩蔽可以降低或增强对后续刺激的反应。在沙鼠中，那些降低复合动作电位（CAP）幅度的掩蔽声的频率-强度域可以绘制为明确定义的CAP调谐曲线（TC）。还发现了一些区域，在这些区域中掩蔽会增加（增强）CAP的幅度。在大约三分之二接受测试的动物中发现了中心频率（CF）增强域，这是对频率非常接近探测刺激频率的掩蔽声的反应，强度范围从低于CAP检测阈值到略低于TC的峰值阈值。大约三分之二表现出CF增强的动物在对与TC低频尾部相邻的区域的反应中也表现出低频（LF）增强。
