An event-related brain potential correlate of visual short-term memory
An event-related brain potential correlate of visual short-term memory
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DOI：
10.1097/00001756-199907130-00002
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发表时间：
1999-07-13
期刊：
影响因子：
1.7
通讯作者：
Mulder, G
中科院分区：
文献类型：
--
作者：
Klaver, P;Talsma, D;Mulder, G
事件相关电位（ERP）被记录为12名受试者进行延迟匹配样本任务。我们提出了两个双边的抽象形状和空间线索，必须记住随后的匹配任务：左，右或两者兼而有之。在记忆过程中，在所记忆形状对侧的半球上产生了后部缓慢的负向ERP波。这种效应在高和低记忆负荷试验中是相似的，而记忆数字是可见的（1000 ms）。随着数字消失（持续1500 ms），该效应仅在低内存负载条件下持续存在。我们认为，对侧负反映了视觉短期记忆的过程，在高记忆负荷条件下的容量限制导致这个过程崩溃。NeuroReport 10：2001-2005（C）1999 Lippincott威廉姆斯& Wilkins.
EVENT-RELATED potentials (ERPs) were recorded as 12 subjects performed a delayed matching to sample task. We presented two bilateral abstract shapes and cued spatially which had to be memorized for a subsequent matching task: left, right or both. During memorization a posterior slow negative ERP wave developed over the hemisphere contralateral to the memorized shape. This effect was similar in high and low memory load trials while the memory figure were visible (for 1000 ms). As the figures disappeared (for 1500 ms), the effect persisted only in the low memory load conditions. We suggest that the contralateral negativity reflects a visual short-term memory process and that capacity limitation in the high memory load condition causes this process to collapse. NeuroReport 10:2001-2005 (C) 1999 Lippincott Williams & Wilkins.