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首页> 外文期刊>Experimental Brain Research >Reaction times of manual responses to a visual stimulus at the goal of a planned memory-guided saccade in the monkey
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Reaction times of manual responses to a visual stimulus at the goal of a planned memory-guided saccade in the monkey

机译：以猴子中计划的记忆引导扫视为目标的手动响应视觉刺激的反应时间

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摘要

Monkeys demonstrate improved contrast sensitivity at the goal of a planned memory-guided saccade (Science 299:81–86, 2003). Such perceptual improvements have been ascribed to an endogenous attentional advantage induced by the saccade plan. Speeded reaction times have also been used as evidence for attention. We therefore asked whether the attentional advantage at the goal of a planned memory-guided saccade led to speeded manual reaction times following probes presented at the saccade goal in a simple detection task. We found that monkeys showed slower manual reaction times when the probe appeared at the memorized goal of the planned saccade when compared to manual reaction times following a probe that appeared opposite the saccade goal. Flashing a distractor at the saccade goal after target presentation appeared to slow reaction times further. Our data, combined with prior results, suggest that a spatially localized inhibition operates on the neural representation of the saccade goal. This inhibition may be closely related or identical to the processes underlying inhibition-of-return. We also found that if the same detection task was interleaved with a difficult perceptual discrimination task, manual reaction times became faster when the probe was at the saccade goal. We interpret these results as being an effect of task difficulty; the more difficult interleaved task may have engaged endogenous attentional resources more effectively, allowing it to override the inhibition at the saccade goal. We construct and discuss a simple working hypothesis for the relationship between the effects of prior attention on neural activity in salience maps and on performance in detection and discrimination tasks.
机译：猴子在计划的记忆引导扫视的目标下表现出改善的对比敏感度（科学299：81-86，2003）。这种感知上的改善已归因于扫视计划所引起的内在注意优势。加快的反应时间也已被用作关注的证据。因此，我们问到在计划的记忆引导扫视目标上的注意力优势是否导致在简单的检测任务中针对扫视目标提出的探测之后加快的手动反应时间。我们发现，与探针出现在扫视目标相反的手动反应时间相比，当探针出现在计划扫视的记忆目标处时，猴子的手动反应时间较慢。在目标呈现后，将干扰物闪到扫视目标上似乎会进一步减慢反应时间。我们的数据与先前的结果相结合，表明空间定位的抑制作用在扫视目标的神经表示上。这种抑制可能与抑制返回的过程密切相关或相同。我们还发现，如果将相同的检测任务与困难的感知辨别任务交错在一起，则当探针处于扫视目标时，手动反应时间会变快。我们将这些结果解释为任务难度的结果；越困难的交错任务可能更有效地利用了内源性注意力资源，从而使其可以克服扫视目标的抑制作用。我们构造并讨论了一个简单的工作假设，即事前注意对显着图中神经活动的影响与检测和辨别任务中的性能之间的关系。

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  • 来源
    《Experimental Brain Research》 |2006年第1期|102-114|共13页
  • 作者

    B. Suresh Krishna; Sara C. Steenrod; James W. Bisley; Yevgeniy B. Sirotin; Michael E. Goldberg;

  • 作者单位

    Mahoney Center for Brain and Behavior Center for Neurobiology and Behavior Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute;

    Mahoney Center for Brain and Behavior Center for Neurobiology and Behavior Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute;

    Mahoney Center for Brain and Behavior Center for Neurobiology and Behavior Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute;

    Mahoney Center for Brain and Behavior Center for Neurobiology and Behavior Columbia University College of Physicians and Surgeons and the New York State Psychiatric Institute;

    Mahoney Center for Brain and Behavior Center for Neurobiology and Behavior Columbia University College of Physicians and Surgeons and the New York State Psychiatric InstituteDepartments of Neurology and Psychiatry Columbia University College of Physicians and Surgeons;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Attention; Saccades; Reaction time; Macaca Mulatta;

    机译：注意;扫视;反应时间;猕猴;

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