[大脑偏侧和半球间连接:神经生物学方面]。

F Aboitiz
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引用次数: 0

摘要

这篇综述总结了支持大脑侧化的两种解剖相关性的证据。第一种假说是皮层不对称,目前已被广泛接受。现在已经知道,大脑中与所谓的“语言区”相对应的区域存在显著的不对称性。这些不对称存在于大体解剖水平(即,侧裂的长度)和更详细的细胞结构水平。此外,我们知道,在不同的受试者中,不对称的程度与功能侧化的程度密切相关。第二个解剖学变量是神经连通性。胼胝体被认为是侧化大脑工作的关键。有一些有争议的报告认为胼胝体结构与大脑侧化相关的参数(如性别和利手性)之间存在相关性。结合对这些结果的分析,本文综述了胼胝体的精细结构和发育的一些方面。这些考虑导致了关于大脑侧化和神经连通性之间关系的具体假设的提出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
[Cerebral laterality and interhemispheric connections: neurobiologic aspects].

This review summarizes evidence favouring two kinds of anatomical correlates of cerebral lateralization. The first, cortical asymmetries, is widely accepted today. It is now known that there are significant asymmetries in brain regions corresponding to the so-called "language areas". These asymmetries are present at the level of gross anatomy (i.e., length of the Sylvian fissure), and at a more detailed cytoarchitectonic level. Furthermore, it is known that, in different subjects, the extent of the asymmetries correlates well with the degree of functional lateralization. The second anatomical variable is commisural connectivity. The corpus callosum has been postulated as pivotal in the workings of a lateralized brain. There have been controversial reports suggesting a correlation between callosal structure and parameters related to brain lateralization, such as sex and handedness. Together with analysing these results, this review considers some aspects of the fine structure and development of the corpus callosum. These considerations lead to the proposal of specific hypotheses about the relation between brain lateralization and commisural connectivity.

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