van Vugt Marieke K, Schulze-Bonhage Andreas, Sekuler Robert, Litt Brian, Brandt Armin, Baltuch Gordon, Kahana Michael J
Center for the Study of Brain, Mind and Behavior, Green Hall Princeton University, Princeton, NJ 08540, USA.
Brain Res. 2009 Nov 24;1299:33-44. doi: 10.1016/j.brainres.2009.07.016. Epub 2009 Jul 16.
Behavioral studies of visual recognition memory indicate that old/new decisions reflect both the similarity of the probe to the studied items (probe-item similarity) and the similarities among the studied items themselves (list homogeneity). Recording intracranial electroencephalography from 1,155 electrodes across 15 patients, we examined the oscillatory correlates of probe-item similarity and homogeneity effects in short-term recognition memory for synthetic faces. Frontal areas show increases in low-frequency oscillations with both probe-item and item-item similarity, whereas temporal lobe areas show distinct oscillatory correlates for probe-item similarity and homogeneity in the gamma band. We discuss these frontal low-frequency effects and the dissociation in the temporal lobe in terms of recent computational models of visual recognition memory.
视觉识别记忆的行为学研究表明，新旧判断既反映了探测刺激与所学项目的相似性（探测刺激-项目相似性），也反映了所学项目本身之间的相似性（列表同质性）。我们通过记录15名患者1155个电极的颅内脑电图，研究了合成面孔短期识别记忆中探测刺激-项目相似性和同质性效应的振荡相关性。额叶区域在低频振荡方面，随着探测刺激-项目和项目-项目相似性均有所增加，而颞叶区域在伽马波段显示出探测刺激-项目相似性和同质性的不同振荡相关性。我们根据视觉识别记忆的最新计算模型讨论了这些额叶低频效应和颞叶的分离现象。
