NEURAL SIGNALS AT THE SPATIOTEMPORAL EDGE

这一提议概述了一年内的研究，以检查清醒行为灵长类动物的外侧膝状核内神经信号的强度，以响应时空边缘。人类心理物理研究使用不可见的幻觉（如向前和向后掩蔽）表明，在使目标不可见方面，最有效的是空间中掩蔽的边缘，以及它们开始和结束的时间（它们的时间边缘）。因此，对掩蔽很重要的神经信号最有可能与掩蔽的时空边缘相关联。该实验将通过记录单个单元，同时显示先前人类心理物理实验中使用的刺激，来检查灵长类动物外侧膝状核中这些边缘效应（空间和时间）的神经相关性。这些实验将空间边缘效应和时间边缘效应分离开来，分别对它们进行测试。研究结果应该能揭示出来自掩膜时空边缘的神经抑制的相对强度，并与掩膜时空内部产生的信号进行比较。

This proposal outlines a single year of research to examine the strength of neural signals within the lateral geniculate nucleus of awake behaving primates, in response to spatiotemporal edges. Human psychophysical studies using illusions of invisibility (such as forward and backward masking) have shown that it is the edges of masks in space, as well as the timing of their onset and termination (their temporal edges), that are most effective in rendering targets invisible. Neural signals important to masking are therefore most likely to be associated with the mask s spatiotemporal edge. The proposed experiments will examine the neural correlates of these edge effects (both spatial and temporal) in the lateral geniculate nucleus of primates by recording from single-units while displaying stimuli used in previous human psychophysical experiments. These experiments will segregate the spatial edge effects from the temporal edge effects and test them conveyed separately. The results should reveal the relative strength of neural inhibition from the spatiotemporal edge of the mask in comparison with the signal generated in the mask s spatial and temporal interior.