Vrije Universiteit Amsterdam, Amsterdam, The Netherlands; and.
J Neurophysiol. 2013 Nov;110(10):2370-7. doi: 10.1152/jn.00293.2013. Epub 2013 Aug 28.
The oculomotor system serves as the basis for representing concurrently competing motor programs. Here, we examine whether the oculomotor system also keeps track of the outcome of competition between target and distractor on the previous trial. Participants had to perform a simple task of making a saccade toward a predefined direction. On two-thirds of the trials, an irrelevant distractor was presented to either the left or right of the fixation. On one-third of the trials, no distractor was present. The results show that on trials without a distractor, saccades curved away from the empty location that was occupied by a distractor on the previous trial. This result was replicated and extended to cases when different saccade directions were used. In addition, we show that repetition of distractor location on the distractor-present trials results in a stronger curvature away and in a shorter saccade latency to the target. Taken together, these results provide strong evidence that the oculomotor system automatically codes and retains locations that had been ignored in the past to bias future behavior.
眼球运动系统是代表同时竞争的运动程序的基础。在这里，我们研究眼球运动系统是否也能跟踪上一个试验中目标和干扰之间竞争的结果。参与者必须执行一个简单的扫视任务，将视线转向预定的方向。在三分之二的试验中，一个不相关的干扰物出现在注视点的左侧或右侧。在三分之一的试验中，没有干扰物。结果表明，在没有干扰物的试验中，扫视会偏离上一个试验中被干扰物占据的空位置。这个结果被复制并扩展到使用不同扫视方向的情况。此外，我们还表明，在存在干扰物的试验中，重复干扰物的位置会导致更强的偏离和更短的扫视潜伏期到目标。综上所述，这些结果有力地证明了眼球运动系统自动编码并保留过去被忽略的位置，以影响未来的行为。
