Hempel de Ibarra N, Giurfa M, Vorobyev M
Institut für Biologie--Neurobiologie, Freie Universität Berlin, Germany.
J Comp Physiol A. 2001 Apr;187(3):215-24. doi: 10.1007/s003590100192.
We asked whether the detection range of two-coloured centre-surround patterns differs from that of single-coloured targets. Honeybees Apis mellifera were trained to distinguish between the presence and absence of a single-coloured disc or a coloured pattern at different visual angles. The patterns presented colours which were either different in chromatic and L-receptor contrasts to the background, equal in chromatic but different in L-receptor contrasts, or vice-versa. Patterns with colours presenting only chromatic contrast were also tested. Patterns with higher L-receptor contrast in its outer than in its inner element were better detected than patterns with a reversed L-contrast distribution. However, both were detected worse than single-coloured discs of the respective colours. When the L-receptor contrast was the same for both elements, the detection range of the two-coloured and single-coloured targets was the same. Patterns whose colours lacked L-receptor contrast were detected just as single-coloured targets of the same colours. These results demonstrate that both chromatic and L-receptor contrasts mediate the detection of coloured patterns and that particular distributions of L-receptor contrast within a target are better detected than others. This finding is consistent with the intervention of neurons with centre-surround receptive fields in the detection of coloured patterns.
我们研究了双色中心-外周模式的检测范围是否与单色目标的检测范围不同。训练意大利蜜蜂（Apis mellifera）在不同视角下区分单色圆盘或彩色图案的有无。所呈现图案的颜色在色度和L受体对比度方面与背景相比，要么不同，要么色度相同但L受体对比度不同，反之亦然。还测试了仅呈现色度对比度的颜色图案。外周元素的L受体对比度高于内部元素的图案比L对比度分布相反的图案更容易被检测到。然而，两者的检测效果都比相应颜色的单色圆盘差。当两个元素的L受体对比度相同时，双色和单色目标的检测范围相同。颜色缺乏L受体对比度的图案与相同颜色的单色目标的检测效果相同。这些结果表明，色度和L受体对比度都介导了彩色图案的检测，并且目标内L受体对比度的特定分布比其他分布更容易被检测到。这一发现与具有中心-外周感受野的神经元在彩色图案检测中的干预作用相一致。
