New questions on the hemispheric encoding/retrieval asymmetry (HERA) model assessed by divided visual-field tachistoscopy in normal subjects
New questions on the hemispheric encoding/retrieval asymmetry (HERA) model assessed by divided visual-field tachistoscopy in normal subjects
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DOI：
10.1016/s0028-3932(00)00119-6
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发表时间：
2001-01-01
期刊：
影响因子：
2.6
通讯作者：
Faure, S
中科院分区：
文献类型：
--
作者：
Blanchet, S;Desgranges, B;Faure, S
根据半球编码/检索不对称（HERA）模型，基于功能性神经影像学数据，左侧和右侧前额叶皮层分别优先参与长期情景记忆编码和检索。在本研究中，使用分视野视速镜从行为角度对HERA模型进行了测试。设计了一个包含语言和视觉空间材料的识别范式，以区分与记忆相关的效应（编码与检索）和与材料相关的效应。该范式分别使用12个和4个项目的列表来评估长期情景记忆和短期记忆。后一种情况的目的是测试HERA模型是否适用于短期记忆。对于长期情景记忆，获得的数据验证了HERA模型；研究发现，大脑半球不对称的方向取决于所用材料的类型，而其大小则取决于记忆过程的类型。对于言语短期记忆，HERA模型似乎得到了证实。材料的预先存在表征可以考虑到短期记忆和长期记忆之间半球不对称模式的相似性。相比之下，对于视觉空间短期记忆，巴德利的工作记忆模型似乎更好地解释了我们的结果，因为不对称本质上与编码材料有关，而与检索材料无关。短期记忆和长期记忆之间的后一种差异表明，LTM中涉及的过程本身依赖于情景过程，因此，为HERA模型提供了更多支持。因此，这两种记忆系统似乎发挥了两种不同的半球专门化模式。2001爱思唯尔科学有限公司版权所有。
According to the hemispheric encoding/retrieval asymmetry (HERA) model, based on data obtained through functional neuroimaging, the left and right prefrontal cortices are preferentially, and, respectively, involved in long-term episodic memory encoding and retrieval. In this study, the HERA model was tested from a behavioral perspective using divided visual-field tachistoscopy. A recognition paradigm with both verbal and visuospatial materials was devised to differentiate memory-related effects (encoding vs. retrieval) from effects linked to the materials. The paradigm used lists of 12 and four items to assess long-term episodic memory and short-term memory, respectively. The aim of the latter condition was to test whether the HERA model is applicable in short-term memory. For long-term episodic memory, the data obtained validated the HERA model; the direction of the hemispheric asymmetry was found to depend on the type of materials used, whereas its magnitude was determined by the type of memory process. For verbal short-term memory, the HERA model seems to be confirmed. The pre-existing representations of the material could take into account the similarity of the hemispheric asymmetry pattern between short-term memory and long-term memory. In contrast, for visuospatial short-term memory, Baddeley's working memory model seems to better explain our results insofar as the asymmetries were essentially linked to the material in encoding but not in retrieval. This latter difference between short-term memory and long-term indicates that processes involved in LTM depend on episodic processes per se, hence, lending more support for the HERA model. Accordingly, these two memory systems seem to bring into play two different modes of hemisphere specialization. (C) 2001 Elsevier Science Ltd. All rights reserved.