Effect of auditory-nerve response variability on estimates of tuning curves
Effect of auditory-nerve response variability on estimates of tuning curves
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DOI：
10.1121/1.2794880
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发表时间：
2007-12-01
影响因子：
2.4
通讯作者：
Heinz, Michael G.
中科院分区：
文献类型：
--
作者：
Chintanpalli, Ananthakrishna;Heinz, Michael G.
听神经(AN)响应的近泊松变异性限制了自动调谐曲线算法的准确性。在这里，典型的自适应调谐曲线算法与生理上真实的AN模型一起使用，其中包含和不包含神经随机性。回答的随机性在Q(10)估计中产生了几乎与数据一样大的变异性。结果表明，模型根据每个特征频率(Cf)的平均Q(10)值来指定频率选择性是足够的。CF的估计误差对于时空编码的研究是重要的，其从低频时的+/-0.2倍频程下降到高频时的+/-0.05倍频程。(C)2007年美国声学学会
Near-Poisson variability in auditory-nerve (AN) responses limits the accuracy of automated tuning-curve algorithms. Here, a typical adaptive tuning-curve algorithm was used with a physiologically realistic AN model with and without the inclusion of neural randomness. Response randomness produced variability in Q(10) estimates that was nearly as large as in AN data. Results suggest that it is sufficient for AN models to specify frequency selectivity based on mean Q(10) values at each characteristic frequency (CF). Errors in estimates of CF, which decreased from +/- 0.2 octaves at low frequencies to +/- 0.05 octaves at high frequencies, are significant for studies of spatiotemporal coding. (c) 2007 Acoustical Society of America