DYNAMIC POLARIZATION VECTOR OF SPATIALLY TUNED NEURONS
DYNAMIC POLARIZATION VECTOR OF SPATIALLY TUNED NEURONS
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DOI：
10.1109/10.99068
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发表时间：
1991-11-01
影响因子：
4.6
通讯作者：
ANGELAKI, DE
中科院分区：
文献类型：
--
作者：
ANGELAKI, DE
以前对耳石神经元动态特性的研究一直很困难，因为各个细胞对特定刺激方向的反应敏感性不同，并且缺乏可以解释和解释其所有反应特征的通用数学方案。本文描述了一种估计神经元（例如耳石神经元）的空间和时间特性的方法，这些神经元在空间上调谐到不同的刺激方向。在每个刺激频率下，可以根据沿三个线性独立轴的刺激引起的神经反应构建响应椭圆。椭圆的长半轴将指定神经元的最大灵敏度方向（偏振矢量），而短半轴将提供其在垂直方向的灵敏度。该方法对短半轴非零长度的预测在质量上与实验观察到的响应相位对刺激方向的依赖性相同。
The study of the dynamic properties of otolith neurons has been difficult previously because of the differing response sensitivities of individual cells to specific stimulus directions and the lack of a general mathematical scheme that could explain and account for all their response features. The present paper describes a method for estimating both the spatial and temporal properties of neurons like the otolith neurons that are spatially tuned to different stimulus directions. At each stimulus frequency, a response ellipse can be constructed from the neural responses elicited by stimulation along three linear independent axes. The semimajor axis of the ellipse will specify the neuron's direction of maximum sensitivity (polarization vector), whereas the semiminor axis will provide its sensitivity in the perpendicular direction. The predictions of the method for nonzero length of the semiminor axis are qualitatively the same as the experimentally observed dependance of response phase on stimulus orientation.