Columbia University.
J Cogn Neurosci. 1997 Jan;9(1):92-104. doi: 10.1162/jocn.1997.9.1.92.
This study investigates the hemispheric organization of visual memories. In five experiments, we examine the processes associated with the recognition of line patterns that are flashed laterally during a study phase. The first three experiments demonstrate a recognition advantage for patterns presented at test in the same (rather than in the opposite) hemifield in which they were presented during a previous study phase. This difference was obtained even when stimuli were presented in different locations within the same hemifield. Experiment shows that patterns presented centrally during the recognition phase elicit ERPs that are systematically more negative over the hemisphere contralateral to the side at which they were presented during the study phase. In Experiment 5, however, we found that subjects were unable to indicate the side of initial presentation of the patterns. The results suggest that the memory traces left by laterally presented stimuli are more easily accessible in the contralateral hemisphere, which suggests a contralateral organization of visual memories.
本研究探讨了视觉记忆的半球组织。在五个实验中，我们研究了与在研究阶段期间横向呈现的线图案的识别相关的过程。前三个实验表明，在测试中呈现与在先前的研究阶段期间呈现的相同（而不是相反）半视野中的图案具有识别优势。即使在同一半视野中呈现不同的位置，也可以获得这种差异。实验表明，在识别阶段中央呈现的图案诱发的 ERP 在与研究阶段呈现的图案相反的半球上系统地更负。然而，在实验 5 中，我们发现，受试者无法指示图案的初始呈现侧。结果表明，横向呈现的刺激留下的记忆痕迹在对侧半球更容易访问，这表明视觉记忆的对侧组织。
