Grossberg S, Mingolla E, Ross W D
Dept of Cognitive and Neural Systems, Boston University, MA 02215, USA.
Trends Neurosci. 1997 Mar;20(3):106-11. doi: 10.1016/s0166-2236(96)01002-8.
How the brain generates visual percepts is a central problem in neuroscience. We propose a detailed neural model of how lateral geniculate nuclei and the interblob cortical stream through V1 and V2 generate context-sensitive perceptual groupings from visual inputs. The model suggests a functional role for cortical layers, columns, maps and networks, and proposes homologous circuits for V1 and V2 with larger-scale processing in V2. An integrated treatment of interlaminar, horizontal, orientational and endstopping cortical interactions and a role for corticogeniculate feedback in grouping are proposed. Modeled circuits simulate parametric psychophysical data about boundary grouping and illusory contour formation.
大脑如何产生视觉感知是神经科学中的一个核心问题。我们提出了一个详细的神经模型，该模型阐述了外侧膝状核以及通过V1和V2的斑点间皮质流如何从视觉输入中生成上下文敏感的感知分组。该模型揭示了皮质层、柱、图谱和网络的功能作用，并提出了V1和V2的同源电路，以及V2中更大规模的处理过程。本文还提出了对层间、水平、方向和终端抑制性皮质相互作用的综合论述，以及皮质膝状体反馈在分组中的作用。模拟电路模拟了关于边界分组和错觉轮廓形成的参数化心理物理学数据。
