ERP evidence for hemispheric asymmetries in exemplar-specific explicit memory access
ERP evidence for hemispheric asymmetries in exemplar-specific explicit memory access
复制标题
特定样本显式记忆访问中半球不对称的 ERP 证据
DOI：
10.1016/j.brainres.2015.08.004
复制
发表时间：
2015
期刊：
影响因子：
2.9
通讯作者：
Zimmer. H. D.
中科院分区：
文献类型：
--
作者：
Küper;Zimmer. H. D.
右脑半球（RH）似乎比左半球（LH）更有效地将视觉对象表示为不同的范例，左半球可能偏向于在抽象原型层面上编码对象。到目前为止，人们对样本特异性的不对称在外显记忆检索层面所起的作用知之甚少。在本研究中，我们通过检查熟悉度（FN400）和回忆（LPC）的推定事件相关电位（ERP）相关性中的半球不对称性来解决这个问题。在附带学习阶段，集中呈现熟悉物体的图片。在测试中，参与者对相同的重复和不同的研究项目范例以及使用分割视野技术仅在一个视觉半场中呈现的新项目执行记忆包含任务。就熟悉度而言，我们观察到样本特定的 FN400 新旧效应，对于相同的重复比不同的样本更明显，无论控制初始刺激处理的半球如何。相比之下，LPC 的旧/新效应受到一些半球不对称的影响，这表明右侧的样本特异性记忆比左侧更广泛。这进一步证实了这样的观点：半球不对称不应该被概括，而不仅需要在不同的领域而且需要在不同的处理水平上进行区分。
The right cerebral hemisphere (RH) appears to be more effective in representing visual objects as distinct exemplars than the left hemisphere (LH) which is presumably biased towards coding objects at the level of abstract prototypes. As of yet, relatively little is known about the role that asymmetries in exemplar-specificity play at the level of explicit memory retrieval. In the present study, we addressed this issue by examining hemispheric asymmetries in the putative event-related potential (ERP) correlates of familiarity (FN400) and recollection (LPC). In an incidental study phase, pictures of familiar objects were presented centrally. At test, participants performed a memory inclusion task on identical repetitions and different exemplars of study items as well as new items which were presented in only one visual hemifield using the divided visual field technique. With respect to familiarity, we observed exemplar-specific FN400 old/new effects that were more pronounced for identical repetitions than different exemplars, irrespective of the hemisphere governing initial stimulus processing. In contrast, LPC old/new effects were subject to some hemispheric asymmetries indicating that exemplar-specific recollection was more extensive in the RH than in the LH. This further corroborates the idea that hemispheric asymmetries should not be generalized but need to be distinguished not only in different domains but also at different levels of processing.
登录
查看更多内容
关于知觉启动中的功能性大脑不对称性
影响因子：
2.5
作者：
Mika Koivisto
通讯作者：
Mika Koivisto
影响因子：
2.6
作者：
BIEDERMAN, I;COOPER, EE
通讯作者：
COOPER, EE
影响因子：
8.2
作者：
H. Zimmer;Ullrich K. H. Ecker
通讯作者：
H. Zimmer;Ullrich K. H. Ecker
影响因子：
3.5
作者：
Burgund, ED;Marsolek, CJ
通讯作者：
Marsolek, CJ
刺激编码和记忆搜索对面部识别中右半球优势的贡献：行为和电生理学证据
影响因子：
2.6
作者：
S. Schweinberger;W. Sommer
通讯作者：
W. Sommer