QUANTITATIVE CHARACTERIZATION PROCEDURE FOR AUDITORY NEURONS BASED ON THE SPECTRO-TEMPORAL RECEPTIVE-FIELD
QUANTITATIVE CHARACTERIZATION PROCEDURE FOR AUDITORY NEURONS BASED ON THE SPECTRO-TEMPORAL RECEPTIVE-FIELD
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DOI：
10.1016/0378-5955(83)90052-7
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发表时间：
1983-01-01
期刊：
影响因子：
2.8
通讯作者：
JOHANNESMA, PIM
中科院分区：
文献类型：
--
作者：
EGGERMONT, JJ;AERTSEN, AMHJ;JOHANNESMA, PIM
在听觉信息处理的研究中，除了提供刺激波形外，还经常提供声音刺激的动态频谱（声像图）。声波图以一种结合的方式呈现声音的频谱和时间特性，反映了被认为与中央信息处理相关的特性。对草蛙中脑记录的12个神经元，高斯宽带噪声刺激的声波图与神经元对该噪声的输出相关联。从这个输入输出相关图中，计算了光谱时间接受野（STRF）。STRF反映了影响神经元放电概率的刺激的频谱和时间特性。开发了一个定量程序来计算神经元的响应，因为它可以从STRF中得到。这个过程基本上包括STRF和刺激声图之间的卷积，然后是各个频带的总和。通过这种方法，可以估计出STRF在多大程度上表征了神经元的放电行为。启发式方法将神经元建模为一系列平行的带通滤波器、求和器和静态非线性，代表峰值产生机制，从而大大改善了表征。
Studies dealing with auditory information processing often present the dynamic spectrum of the sound stimulus (sonogram) in addition to the stimulus waveform. The sonogram, presenting the spectral and temporal properties of the sound in a combined way, reflects properties that are assumed relevant in central information processing. For 12 neurons recorded from the midbrain of the grass frog, the sonogram of a Gaussian wide-band noise stimulus was correlated with the output of the neuron to that noise. From this input-output correlogram, the spectrotemporal receptive field (STRF) was calculated. The STRF reflects those spectral and temporal properties of the stimulus that influence the firing probability of the neuron. A quantitative procedure was developed to calculate the neuron''s response as far as it could be derived from the STRF. This procedure basically consisted of a convolution between STRF and the sonogram of the stimulus followed by a summation over the various frequency bands. In this way it proved possible to estimate to what extent the STRF characterized the neuron''s firing behavior. Heuristic approaches, in which the neuron was modeled to a parallel series of band-pass filters, a summator and a static nonlinearity, representing a spike-generating mechanism, resulted in a considerable improvement of the characterization.