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The effect of gaze direction on the different components of visuo-spatial short-term memory

机译：注视方向对视觉空间短时记忆不同组成部分的影响

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Cerebral asymmetries and cortical regions associated with the upper and lower visual field were investigated using shifts of gaze. Earlier research suggests that gaze shifts to the left or right increase activation of specific areas of the contralateral hemisphere. We asked whether looking at one quadrant of the visual field facilitates the recall in various visuo-spatial tasks. The different components of visuo-spatial memory were investigated by probing memory for a stimulus matrix in each quadrant of the screen. First, memory for visual images or patterns was probed with a matrix of squares that was simultaneously presented and had to be reconstructed by mouse click. Better memory performance was found in the upper left quadrant compared to the three other quadrants indicating that both laterality and elevation are important. Second, positional memory was probed by subsequently presenting squares which prevented the formation of a visual image. Again, we found that gaze to the upper left facilitated performance. Third, memory for object-location binding was probed by asking observers to associate objects to particular locations. Higher performance was found with gaze directed to the lower quadrants irrespective of lateralization, confirming that only some components of visual short-term memory have shared neural substrates.
机译：使用视线移动来研究与上下视野相关的大脑不对称和皮质区域。较早的研究表明，注视向左或向右移动会增强对侧半球特定区域的激活。我们问了看视野的一个象限是否有助于各种视觉空间任务的召回。通过在屏幕的每个象限中探查刺激矩阵的记忆来研究视觉空间记忆的不同组成部分。首先，用正方形矩阵探测视觉图像或图案的内存，该正方形矩阵同时显示并且必须通过单击鼠标来重建。与其他三个象限相比，左上象限中发现了更好的记忆性能，这表明横向和高度都很重要。其次，通过随后呈现防止视觉图像形成的正方形来探测位置记忆。同样，我们发现凝视左上方有助于提高性能。第三，通过要求观察者将对象与特定位置相关联来探究用于对象位置绑定的内存。视线指向较低的象限，而不考虑侧向化，发现了较高的性能，这证实了视觉短期记忆的仅某些部分具有共享的神经底物。

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