视锥-视杆细胞相互作用空间特性的决定因素。

Determinants of the spatial properties of cone-rod interaction.

作者信息

Buck S L

出版信息

Vision Res. 1985;25(9):1277-84. doi: 10.1016/0042-6989(85)90043-4.

PMID:4072008

Abstract

Photopic increment thresholds can be elevated by 0.2-1.9 log units, depending on the diameter of a concentric scotopic background. This cone-rod interaction displays spatial properties that resemble the spatial sensitization (Westheimer effect) observed in the isolated scotopic and photopic systems. This raises the possibility that the spatial properties of the interaction are determined by the same mechanisms or pathways that determine the spatial properties of either scotopic or photopic vision. When annulus backgrounds are used, the spatial properties of interaction match those of the scotopic system but not the photopic system. When disk backgrounds are used, the spatial properties of interaction match those of neither photopic nor scotopic systems. Thus, under some conditions, the scotopic visual system alone is sufficient to determine the spatial properties of cone-rod interaction. Under other conditions, additional complications arise. The results are discussed in terms of the center-surround model that has previously been applied to cone-rod interaction.

摘要

明视觉增量阈值可提高0.2 - 1.9对数单位，这取决于同心暗视觉背景的直径。这种锥-杆相互作用表现出的空间特性类似于在孤立的暗视觉和明视觉系统中观察到的空间敏化（韦斯特海默效应）。这就增加了一种可能性，即这种相互作用的空间特性是由决定暗视觉或明视觉空间特性的相同机制或途径所决定的。当使用环形背景时，相互作用的空间特性与暗视觉系统的相匹配，但与明视觉系统的不匹配。当使用圆盘背景时，相互作用的空间特性既不与明视觉系统的匹配，也不与暗视觉系统的匹配。因此，在某些条件下，仅暗视觉系统就足以决定锥-杆相互作用的空间特性。在其他条件下，则会出现额外的复杂情况。将根据先前应用于锥-杆相互作用的中心-周边模型来讨论这些结果。