Effects of structured nontarget stimuli on saccadic latency.
Effects of structured nontarget stimuli on saccadic latency.
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结构化非目标刺激对扫视潜伏期的影响。
DOI：
10.1152/jn.01104.2004
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发表时间：
2005
影响因子：
2.5
通讯作者：
D. Kerzel
中科院分区：
文献类型：
--
作者：
Brian J. White;K. Gegenfurtner;D. Kerzel
有人认为，远程干扰器效应是在目标出现时间附近对代表丘状固定区域的中心区域进行非目标刺激的结果。负责这种效应的细胞的分布式网络被认为延伸到一个大区域，对外围 < 或 = 10 度的干扰物做出响应。一些研究还表明上丘是显示变化引起的扫视反应受到抑制的基础。我们通过使用一片不同大小的粉红噪声作为非目标刺激来进一步研究这一点。我们表明，中心显示的粉红噪声的小斑块（2.3 x 2.3 度）的出现可以使同时呈现的外围 Gabor 目标的扫视潜伏期显着增加。相比之下，大片（36 x 36 度）粉红噪声并没有增加延迟，尽管它也刺激了代表注视区的区域。此外，只有大片噪声在目标出现之前出现时才会促进延迟。我们还检查了这两个极端之间的补丁大小的影响，发现随着补丁大小的增加，延迟稳步减少。这证实了在目标出现时间附近对表示注视区的区域进行非目标刺激本身不足以产生通常在远程干扰器中发现的潜伏期的增加。结果与只有空间受限的物体才会导致丘固定神经元放电的观点相一致。
It has been suggested that the remote distractor effect is the result of nontarget stimulation of a central region representing a collicular fixation zone near the time of target onset. The distributed network of the cells responsible for this effect is believed to extend over a large area, responding to distractors < or =10 deg in the periphery. Several studies also implicate the superior colliculus as the substrate behind an inhibited saccadic response arising from a display change. We investigated this further by using a patch of pink noise of various sizes as a nontarget stimulus. We show that the onset of a small patch (2.3 x 2.3 deg) of centrally displayed pink noise can produce a significant increase in saccadic latency to a simultaneously presented peripheral Gabor target. In contrast, a large patch (36 x 36 deg) of pink noise did not increase latency despite the fact that it also stimulated the region representing the fixation zone. Furthermore, only the large patch of noise facilitated latency when presented before target onset. We also examined the effect of patch sizes between these two extremes and found a steady decrease in latency as patch size increased. This confirms that nontarget stimulation of the region representing the fixation zone near the time of target onset is not in itself sufficient to produce the increase in latency typically found with remote distractors. The results are consistent with the idea that only a spatially confined object leads to a discharge of collicular fixation neurons.
目标可预测性和预先提示如何影响猴子快速眼跳的产生？
DOI：
10.1111/j.1460-9568.2004.03299.x
发表时间：
2004
期刊：
The European journal of neuroscience.
影响因子：
--
作者：
Schiller,PeterH;Haushofer,Johannes;Kendall,Geoffery
通讯作者：
Kendall,Geoffery