Fact Learning in Complex Arithmetic-The Role of the Angular Gyrus Revisited
Fact Learning in Complex Arithmetic-The Role of the Angular Gyrus Revisited
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DOI：
10.1002/hbm.23226
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发表时间：
2016-09-01
影响因子：
4.8
通讯作者：
Klein, Elise
中科院分区：
文献类型：
--
作者：
Bloechle, Johannes;Huber, Stefan;Klein, Elise
在最近的理论研究以及神经影像学研究中，左角回（AG）与算术事实的提取有关。这一解释得到证实，较高的AG活动时，处理训练相比，未经训练的乘法问题。然而，到目前为止，处理训练与未训练问题的神经相关性仅在训练后进行比较。我们采用了一种已建立的学习范式（即，乘法问题的广泛训练），但在训练之前和之后测量大脑激活，以更具体地评估算术事实获取的神经相关性。当比较激活模式的训练和未经训练的问题的训练后，较高的AG激活训练的问题被复制。然而，当将训练问题的激活与训练前阶段中相同问题的激活进行比较时，没有观察到AG的信号变化。相反，我们的研究结果指向海马，海马旁，和压后结构在算术事实检索的核心作用。我们认为，AG可能不与实际检索的算术事实，并概述了注意帐户的作用，AG在算术事实检索是兼容的最近注意记忆假说。(C)2016 Wiley Periodicals，Inc.
In recent theoretical considerations as well as in neuroimaging findings the left angular gyrus ( AG) has been associated with the retrieval of arithmetic facts. This interpretation was corroborated by higher AG activity when processing trained as compared with untrained multiplication problems. However, so far neural correlates of processing trained versus untrained problems were only compared after training. We employed an established learning paradigm ( i.e., extensive training of multiplication problems) but measured brain activation before and afte training to evaluate neural correlates of arithmetic fact acquisition more specifically. When comparing activation patterns for trained and untrained problems of the post-training session, higher AG activation for trained problems was replicated. However, when activation for trained problems was compared to activation for the same problems in the pre-training session, no signal change in the AG was observed. Instead, our results point toward a central role of hippocampal, para-hippocampal, and retrosplenial structures in arithmetic fact retrieval. We suggest that the AG might not be associated with the actual retrieval of arithmetic facts, and outline an attentional account of the role of the AG in arithmetic fact retrieval that is compatible with recent attention to memory hypotheses. (C) 2016 Wiley Periodicals, Inc.