LIP activity in the interstimulus interval of a change detection task biases the behavioral response.
LIP activity in the interstimulus interval of a change detection task biases the behavioral response.
复制标题
变化检测任务的刺激间间隔中的 LIP 活动会导致行为反应产生偏差。
DOI：
10.1152/jn.00604.2015
复制
发表时间：
2015
影响因子：
2.5
通讯作者：
Bisley,JamesW
中科院分区：
文献类型：
--
作者：
Arcizet,Fabrice;Mirpour,Koorosh;Foster,DanielJ;Charpentier,CarolineJ;Bisley,JamesW
当我们环顾世界时，我们只能注意到有限的几个地点。外侧顶内区（LIP）被认为在引导内隐注意和眼球运动方面发挥作用。在这项研究中，我们测试了参与LIP在这两种机制的变化检测任务。在这项任务中，动物们必须通过扫视某个元素来表明它是否在试验的空白期发生了变化，如果没有变化，它们就必须保持注视。我们研究如何动物的行为是有偏见的基础上LIP活动之前，介绍的刺激，动物必须作出反应。当活跃度高时，即使没有变化，动物也更有可能向刺激物移动眼睛;当活跃度低时，动物要么反应时间较慢，要么保持固定，即使发生变化。我们的结论是，LIP活动涉及内隐和外显注意，但当决定眼球运动时，这个角色优先于引导内隐注意。
When looking around at the world, we can only attend to a limited number of locations. The lateral intraparietal area (LIP) is thought to play a role in guiding both covert attention and eye movements. In this study, we tested the involvement of LIP in both mechanisms with a change detection task. In the task, animals had to indicate whether an element changed during a blank in the trial by making a saccade to it. If no element changed, they had to maintain fixation. We examine how the animal's behavior is biased based on LIP activity prior to the presentation of the stimulus the animal must respond to. When the activity was high, the animal was more likely to make an eye movement toward the stimulus, even if there was no change; when the activity was low, the animal either had a slower reaction time or maintained fixation, even if a change occurred. We conclude that LIP activity is involved in both covert and overt attention, but when decisions about eye movements are to be made, this role takes precedence over guiding covert attention.