ABSTRACT According to the original “hub-and-spoke” model of conceptual representations, the neural network for semantic memory requires a single convergence zone located in the anterior temporal lobes (ATLs). However, a more recent version of this model acknowledges that a graded specialization of the left and right ATLs might emerge as a consequence of their differential connectivity with language and sensory-motor regions. A recent influential paper maintained that both the format of semantic representations (representational account) and their differential connectivity (connectivity account) could contribute to the cognitive consequences of atrophy to the left versus the right ATL atrophy. That paper, however, also raised questions as to whether the distinction between representational and connectivity accounts is a meaningful question. I argue that an important theoretical difference exists between the representational and the connectivity-based models and that investigations, based on this difference, should allow to choose between these alternative accounts.

中文翻译：

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左右前颞叶萎缩的认知后果的代表性和基于连接性的解释

摘要根据概念表示的原始“中心辐射”模型，语义记忆的神经网络需要位于前颞叶 (ATL) 的单个收敛区。然而，该模型的更新版本承认左右 ATL 的分级专业化可能是由于它们与语言和感觉运动区域的不同连接性的结果。最近的一篇有影响力的论文认为，语义表征的格式（表征帐户）和它们的差异连接性（连接性帐户）都可能导致左侧 ATL 萎缩与右侧 ATL 萎缩的认知后果。然而，那篇论文也提出了这样的问题，即代表性账户和连通性账户之间的区别是否是一个有意义的问题。