Effects of attention on visuomotor activity in the premotor and prefrontal cortex of a primate.
Effects of attention on visuomotor activity in the premotor and prefrontal cortex of a primate.
复制标题
DOI：
10.3109/08990229309028835
复制
发表时间：
1993
影响因子：
0.9
通讯作者：
G. di Pellegrino;S. Wise
中科院分区：
文献类型：
--
作者：
G. di Pellegrino;S. Wise
我们研究了灵长类动物在空间匹配任务中运动前（PM）和前额叶（PF）区域的神经元活动。在每个行为试验中，当视觉刺激（称为“主要刺激”）在先前提示的位置重新出现时，恒河猴会移动前肢。因为它触发了一个运动，由主要刺激提示的空间部分必须在主要刺激展示之间的时间被记住或参与。在启动刺激第一次和第二次出现之间，与行为无关的视觉刺激可能出现在启动刺激之外的一个或几个位置。因此，我们可以检查刺激出现时的活动，以及刺激不相关且可能不被注意时的活动。我们发现，视觉空间注意力会影响额叶皮层运动和非运动部分的神经元活动。注意力效应的程度超过了先前的报道——这一发现可能是由于当前任务对注意力的强烈要求。
We examined neuronal activity in the primate premotor (PM) and prefrontal (PF) areas during a demanding spatial matching task. On each behavioral trial, a rhesus monkey moved its forelimb when a visual stimulus, called the "prime stimulus," reappeared at a previously cued location. Because it triggered a movement, the part of space cued by the prime stimulus had to be either remembered or attended during the time between prime stimulus presentations. Between the first and second appearances of the prime stimulus, behaviorally irrelevant visual stimuli could appear at one or several locations other than that of the prime stimulus. We could thereby examine the activity that followed a stimulus when it was attended versus when it was irrelevant and presumably unattended. We found that visuospatial attention affected neuronal activity in both the motor and "nonmotor" parts of the frontal cortex. The magnitude of attention effects exceeded that previously reported--a finding that probably resulted from the intensive attentional demands of the present task.