THE SPECTRO-TEMPORAL RECEPTIVE-FIELD - A FUNCTIONAL CHARACTERISTIC OF AUDITORY NEURONS
THE SPECTRO-TEMPORAL RECEPTIVE-FIELD - A FUNCTIONAL CHARACTERISTIC OF AUDITORY NEURONS
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DOI：
10.1007/bf00336731
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发表时间：
1981-01-01
影响因子：
1.9
通讯作者：
JOHANNESMA, PIM
中科院分区：
文献类型：
--
作者：
AERTSEN, AMHJ;JOHANNESMA, PIM
听觉神经元的时间-频谱感受场（STRF）是根据动作电位发生前的声刺激的平均时间-频谱结构而实验引入的（Aertsen等，1980，1981）。在非线性系统理论的一般框架下，特别是在沃尔泰拉积分表示的形式下，考虑了STRF。STRF被正式确定为二阶沃尔泰拉核的线性泛函。STRF的实验测定导致在维纳展开方面的制定，其中内核可以通过评估系统的输入输出相关性来识别。对于一个高斯刺激合奏和一个非线性系统，没有偶数阶的贡献高于2阶，它示出的第二阶互相关的刺激和响应，归一化相对于刺激合奏的光谱内容，导致刺激不变的spectrotemporal感受野。更一般的非线性系统和刺激合奏可以产生的高斯噪声的非线性变换的STRF的刺激不变性的调查涉及高阶刺激响应相关函数的评价。
The Spectro-Temporal Receptive Field (STRF) of an auditory neuron was introduced experimentally on the base of the average spectro-temporal structure of the acoustic stimuli which precede the occurrence of action potentials (Aertsen et al, 1980, 1981). The STRF was considered in the general framework of nonlinear system theory, especially in the form of the Volterra integral representation. The STRF is formally identified with a linear functional of the 2nd order Volterra kernel. The experimental determination of the STRF leads to a formulation in terms of the Wiener expansion where the kernels can be identified by evaluation of the system''s input-output correlations. For a Gaussian stimulus ensemble and a nonlinear system with no even order contributions of order higher than 2, it is shown that the 2nd order cross correlation of stimulus and response, normalized with respect to the spectral contents of the stimulus ensemble, leads to the stimulus-invariant spectrotemporal receptive field. The investigation of stimulus-invariance of the STRF for more general nonlinear systems and for stimulus ensembles which can be generated by nonlinear transformations of Gaussian noise involve the evaluation of higher order stimulus-response correlation functions.