Stimulation of non-classical receptive field enhances orientation selectivity in the cat
Stimulation of non-classical receptive field enhances orientation selectivity in the cat
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DOI：
10.1113/jphysiol.2004.080051
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发表时间：
2005-04-01
影响因子：
5.5
通讯作者：
Li, CY
中科院分区：
文献类型：
--
作者：
Chen, G;Dan, Y;Li, CY
我们研究了如何非经典感受野（nCRF）的影响，在初级视觉皮层（VI）的细胞在麻醉和麻痹猫使用反向相关方法的动态方向选择性。我们发现，调整到测试刺激的方向取决于刺激区域的大小。一个显着的锐化方向调谐诱导nCRF刺激，与刺激的大小增加的效果的大小。的nCRF上的时间动态的方向调谐的效果也进行了研究，通过检查的范围内的延迟从刺激发作的调谐。我们发现小，但可检测到的变化，随着时间的推移，当经典的感受野（CRF）的首选方向和调谐带宽单独刺激。刺激nCRF显著增加了这些时间变化的幅度。因此，nCRF刺激不仅增强了整体方向选择性，而且丰富了皮层神经元的时间动力学，这可能会增加视觉皮层在信息处理中的计算能力。
We have investigated how the nonclassical receptive field (nCRF) affects dynamic orientation selectivity of cells in the primary visual cortex (VI) in anaesthetized and paralysed cats using the reverse correlation method. We found that tuning to the orientation of the test stimulus depends on the size of the stimulation area. A significant sharpening of orientation tuning was induced by nCRF stimulation, with the magnitude of the effect increasing with the size of stimulation. The effect of the nCRF on the temporal dynamics of orientation tuning was also investigated by examining the tuning over a range of delays from stimulus onset. We found small but detectable changes in both the preferred orientation and the bandwidth of tuning over time when the classical receptive field (CRF) was stimulated alone. Stimulation in nCRF significantly increased the magnitude of these temporal changes. Thus, nCRF stimulation not only enhances the overall orientation selectivity, but also enriches the temporal dynamics of cortical neurones, which may increase the computational power of the visual cortex in information processing.