LINEARITY OF SUMMATION OF SYNAPTIC POTENTIALS UNDERLYING DIRECTION SELECTIVITY IN SIMPLE CELLS OF THE CAT VISUAL-CORTEX
LINEARITY OF SUMMATION OF SYNAPTIC POTENTIALS UNDERLYING DIRECTION SELECTIVITY IN SIMPLE CELLS OF THE CAT VISUAL-CORTEX
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DOI：
10.1126/science.8266083
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发表时间：
1993-12-17
期刊：
影响因子：
56.9
通讯作者：
FERSTER, D
中科院分区：
文献类型：
--
作者：
JAGADEESH, B;WHEAT, HS;FERSTER, D
猫视皮层简单细胞的细胞内记录被用来测试产生视觉运动方向选择性的线性模型。方向选择性被认为在一定程度上是由非线性过程引起的，正如先前基于细胞外动作电位记录的实验所表明的那样。然而，在细胞内记录中，通过对静止刺激的反应的线性求和，可以准确地预测由运动刺激引起的膜电位的波动。不需要非线性机制。
Intracellular recordings from simple cells of the cat visual cortex were used to test linear models for the generation of selectivity for the direction of visual motion. Direction selectivity has been thought to arise in part from nonlinear processes, as suggested by previous experiments that were based on extracellular recordings of action potentials. In intracellular recordings, however, the fluctuations in membrane potential evoked by moving stimuli were accurately predicted by the linear summation of responses to stationary stimuli. Nonlinear mechanisms were not required.