Conditions that alter saccadic eye movement latencies and affect target choice to visual stimuli and to electrical stimulation of area V1 in the monkey.
Conditions that alter saccadic eye movement latencies and affect target choice to visual stimuli and to electrical stimulation of area V1 in the monkey.
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DOI：
10.1017/s0952523808080863
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发表时间：
2008-09
影响因子：
1.9
通讯作者：
Tehovnik, Edward J.
中科院分区：
文献类型：
--
作者：
Schiller, Peter H.;Kendall, Geoffrey L.;Slocum, Warren M.;Tehovnik, Edward J.
在这项研究中，我们研究的程序，改变扫视lavidia和目标选择的视觉刺激和电刺激区V1的猴子。它已被证明，扫视眼运动lavende到单独呈现的视觉目标形成双峰分布时，固定点被关闭的目标的外观（差距周期）之前的毫秒数;第一种模式已被称为快速扫视和第二个规则扫视。当注视点的终止与目标的出现（0 ms间隙）一致时，很少产生快速扫视。我们在这里表明，一个双峰分布的眼跳lavidae也可以得到当一个阵列的视觉刺激的外观之前，提供的阵列的元素与视觉目标的空间重叠。当在固定点的终止和刺激之间引入间隙时，以及当呈现阵列时，由区域V1的电刺激引起的扫视眼球运动的总潜伏期显著缩短。然而，在这些条件下，扫视潜伏期的分布是单峰的。当两个视觉目标出现在注视点之后时，引入间隙对选择哪一个目标没有影响。相比之下，当电刺激与视觉目标配对时，引入间隙大大增加了选择电刺激部位的频率。
In this study we examined procedures that alter saccadic latencies and target selection to visual stimuli and to electrical stimulation of area V1 in the monkey. It has been shown that saccadic eye-movement latencies to singly presented visual targets form a bimodal distribution when the fixation spot is turned off a number of milliseconds prior to the appearance of the target (the gap period); the first mode has been termed express saccades and the second regular saccades. When the termination of the fixation spot is coincident with the appearance of the target (0 ms gap), express saccades are rarely generated. We show here that a bimodal distribution of saccadic latencies can also be obtained when an array of visual stimuli is presented prior to the appearance of the visual target, provided the elements of the array overlap spatially with the visual target. The overall latency of the saccadic eye movements elicited by electrical stimulation of area V1 is significantly shortened both when a gap is introduced between the termination of the fixation spot and the stimulation, and when an array is presented. However, under these conditions, the distribution of saccadic latencies is unimodal. When two visual targets are presented after the fixation spot, introducing a gap has no effect on which target is chosen. By contrast, when electrical stimulation is paired with a visual target, introducing a gap greatly increases the frequency with which the electrical stimulation site is chosen.