The information content of receptive fields
The information content of receptive fields
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DOI：
10.1016/s0896-6273(03)00680-9
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发表时间：
2003-11-13
期刊：
影响因子：
16.2
通讯作者：
Olberg, RM
中科院分区：
文献类型：
--
作者：
Adelman, TL;Bialek, W;Olberg, RM
神经系统必须观察复杂的世界并产生适当的、有时甚至是复杂的行为反应。与这种复杂性相反，神经反应通常通过非常简单的描述（例如感受野或调谐曲线）来表征。这些特征是否充分反映了神经系统中发生的真实降维，或者它们仅仅是方便的过度简化？在这里，我们针对蜻蜓的目标选择性下降神经元（TSDN）解决这个问题。使用 TSDN 群体的细胞外多电极记录，我们量化了这些细胞感受野描述的完整性，并得出结论，独立瞬时位置和速度感受野中的信息占单个尖峰中总信息的 70%-90%。因此，我们证明这个简单的感受野模型接近于引起 TSDN 响应的刺激特征的完整描述。
The nervous system must observe a complex world and produce appropriate, sometimes complex, behavioral responses. In contrast to this complexity, neural responses are often characterized through very simple descriptions such as receptive fields or tuning curves. Do these characterizations adequately reflect the true dimensionality reduction that takes place in the nervous system, or are they merely convenient oversimplifications? Here we address this question for the target-selective descending neurons (TSDNs) of the dragonfly. Using extracellular multielectrode recordings of a population of TSDNs, we quantify the completeness of the receptive field description of these cells and conclude that the information in independent instantaneous position and velocity receptive fields accounts for 70%-90% of the total information in single spikes. Thus, we demonstrate that this simple receptive field model is close to a complete description of the features in the stimulus that evoke TSDN response.