A neural model of decision-making by the superior colicullus in an antisaccade task
A neural model of decision-making by the superior colicullus in an antisaccade task
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DOI：
10.1016/j.neunet.2007.01.004
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发表时间：
2007-08-01
期刊：
影响因子：
7.8
通讯作者：
Perantonis, Stavros
中科院分区：
文献类型：
--
作者：
Cutsuridis, Vassilis;Smyrnis, Nikolaos;Perantonis, Stavros
在反扫视范式中，受试者被指示在与视觉上出现的刺激的位置相反的方向上进行眼球运动，同时他们注视着中枢刺激。最近的一项研究调查了2006年进行视觉引导反扫视的年轻人的扫视反应时间（SRT）和错误的正面扫视（对周边刺激）的百分比。在该大样本中报告了SRT的单峰分布（范围为前80至600 ms）以及总体25%的错误正面应答。在这篇文章中，我们提出了一个基于竞争整合的计划和反应性眼跳决策信号的上级丘的中间层眼跳启动的神经模型。在模型中，决策过程朝着预设的标准水平非线性增长，当它们越过它时，运动被发起。由此产生的模型再现了单峰分布的SRT正确的antisaccades和错误的prosaccades以及变异的SRT和错误的prosaccade响应的百分比。(c)2007爱思唯尔有限公司保留所有权利。
In the antisaccade paradigm subjects are instructed to perform eye movements in the opposite direction from the location of a visually appearing Stimulus while they are fixating on a central stimulus. A recent study investigated saccade reaction times (SRTs) and percentages of erroneous prosaccades (towards the peripheral stimulus) of 2006 young men performing visually guided antisaccades. A unimodal distribution of SRTs (ranging front 80 to 600 ms) as well as an overall 25% of erroneous prosaccade responses was reported in that large sample. In this article, we present a neural model of saccade initiation based on competitive integration of planned and reactive saccade decision signals in the intermediate layer of the superior colliculus. In the model the decision processes grow nonlinearly towards a preset criterion level and when they cross it, a Movement is initiated. The resultant model reproduced the unimodal distributions of SRTs for correct antisaccades and erroneous prosaccades as well as the variability of SRTs and the percentage of erroneous prosaccade responses. (c) 2007 Elsevier Ltd. All rights reserved.