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Excitatory-inhibitory network in the visual cortex: Psychophysical evidence

机译:视觉皮层中的兴奋抑制网络:心理物理证据

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At early stages in visual processing cells respond to local stimuli with specific features such as orien- tation and spatial frequency. Although the receptive fields of these cells have been thought to be local and independent, recent physiological and psychophysical evidence has accu- mulated, indicating that the cells participate in a rich network of local connections. Thus, these local processing units can integrate information over much larger parts of the visual field; the pattern of their response to a stimulus apparently depends on the context presented. To explore the pattern of lateral interactions in human visual cortex under different context conditions we used a novel chain lateral masking detection paradigm, in which human observers performed a detection task in the presence of different length chains of high-contrast-flanked Gabor signals.
机译:在视觉处理的早期阶段,细胞以特定的特征(例如方向和空间频率)响应局部刺激。尽管这些细胞的感受野被认为是局部且独立的,但最近的生理和心理物理学证据已经积累,表明这些细胞参与了丰富的局部连接网络。因此,这些本地处理单元可以在更大的视野范围内整合信息。他们对刺激的反应方式显然取决于所呈现的环境。为了探索在不同背景条件下人类视觉皮层中横向相互作用的模式,我们使用了一种新型的链式横向掩盖检测范式,其中人类观察者在存在高对比度侧翼Gabor信号的不同长度链的情况下执行检测任务。

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