关于对从与人类观察者进行的元对比实验得出的神经信号的分析。

On the analysis of nerve signals deduced from metacontrast experiments with human observers.

Wandell B A

J Physiol. 1976 Dec;263(3):321-9. doi: 10.1113/jphysiol.1976.sp011633.

Abstract

This paper reviews Alpern, Rushton & Torii's (1970a-d) derivation of the size of the inhibitory nerve signal arising from after flashes in the metacontrast experiment. 2. Their geometric argument is recast in terms of simple functional equations. This form of argument clearly displays the role of their assumptions in obtaining their main conclusion: nerve signal is linear in intensity over a range of 3-4 log units. 3. Two disadvantages of their approach are discussed. First, it is noted that in the presence of the data the assumption they employ in their analysis is logically equivalent to their conclusion. 4. Secondly, accepting their claim that the nerve signal generated by the after flash is linear over a broad range of intensities, and that this inhibitory signal simply cancels the excitatory signal of the test flash, leads to the conslusion that over this same intensity range the excitatory nerve signal is a power function with an exponent of close to two. This is incompatible with the suggestion that photoreceptor signals have been measured.

摘要

本文回顾了阿尔珀恩、拉什顿和鸟居（1970年a - d）在元对比实验中对闪光后产生的抑制性神经信号大小的推导。2. 他们的几何论证被重新表述为简单的函数方程。这种论证形式清楚地展示了他们的假设在得出主要结论中的作用：在3 - 4个对数单位的范围内，神经信号强度呈线性。3. 讨论了他们方法的两个缺点。首先，需要指出的是，在有数据的情况下，他们在分析中采用的假设在逻辑上等同于他们的结论。4. 其次，接受他们的说法，即闪光后产生的神经信号在很宽的强度范围内是线性的，并且这种抑制性信号只是简单地抵消了测试闪光的兴奋性信号，这就导致了这样一个结论：在相同的强度范围内，兴奋性神经信号是一个指数接近2的幂函数。这与已经测量到光感受器信号的观点不一致。