Colour adaptation modifies the temporal properties of the long- and middle-wave cone signals in the human luminance mechanism.
Colour adaptation modifies the temporal properties of the long- and middle-wave cone signals in the human luminance mechanism.
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颜色适应改变了人类亮度机制中长波和中波锥体信号的时间特性。
DOI：
10.1111/j.1469-7793.2000.t01-1-00177.x
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Kronauer,RE
中科院分区：
文献类型：
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作者：
Stromeyer3rd,CF;Gowdy,PD;Chaparro,A;Kladakis,S;Willen,JD;Kronauer,RE
人类亮度机制（LUM）检测快速闪烁和运动，分别对来自长波和中波视锥的神经整合L′和M“对比度”信号进行求和。我们先前观察到LUM中L′和M′信号之间的大的时间相移，其在绿色与橙子背景场上是最大的并且符号相反，并且伴随着相对L′和M′对比度权重的大的变化。用阶段性大细胞视网膜神经节细胞模拟这种作用。模型中的L'对比M'对比度权重的变化预测L '和M'亮度信号的时间动态在绿色和橙子场上将不同。这是通过几个协议进行评估的。在橙子场中，1周期度-1漂移光栅或静态脉冲光栅的运动阈值表明，M'信号比L'信号在时间上更具有带通性;这在绿色场中相反。由于L'和M'信号的不同动力学而引起的强运动甚至在同时脉冲化的一对L'和M'光栅的情况下被看到。脉冲响应函数的测量与光栅脉冲空间同相或反相。对于橙子场上的M'信号和绿色场上的L'信号，脉冲响应明显是双相的，而其他信号更持久。脉冲响应预测了在空间正交脉冲光栅中看到的运动。
The human luminance mechanism (LUM) detects rapid flicker and motion, summating the neurally integrated L′ and M’‘contrast’ signals from the long- and middle-wave cones, respectively. We previously observed large temporal phase shifts between the L′ and M′ signals in LUM, which were maximal and of reversed sign on green versus orange background fields and which were accompanied by large variations in the relative L′ and M′ contrast weights. The effects were modelled with phasic magnocellar retinal ganglion cells. The changing L’ versusM′ contrast weights in the model predict that the temporal dynamics of the L′ and M′ luminance signals will differ on green and orange fields. This is assessed with several protocols. Motion thresholds for 1 cycle deg−1 drifting gratings or static pulsed gratings on the orange field show that the M' signal is more temporally bandpass than the L' signal; this reverses on the green field. Strong motion due to the different dynamics of the L' and M' signals is even seen with a pair of L' and M' gratings pulsed simultaneously. Impulse response functions were measured with gratings pulsed spatially in phase or antiphase. The impulse response was clearly biphasic for the M' signal on the orange field and L' signal on the green field, while the other signals were more sustained. The impulse responses predicted the motion seen with gratings pulsed in spatial quadrature.