Hemispheric shape of European and Japanese brains: 3-D MRI analysis of intersubject variability, ethnical, and gender differences
Hemispheric shape of European and Japanese brains: 3-D MRI analysis of intersubject variability, ethnical, and gender differences
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DOI：
10.1006/nimg.2000.0688
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发表时间：
2001-02-01
期刊：
影响因子：
5.7
通讯作者：
Schormann, T
中科院分区：
文献类型：
--
作者：
Zilles, K;Kawashima, R;Schormann, T
半球形状研究使用磁共振成像和3-D重建右手，男性和女性，欧洲和日本的科目。日本半球相对较短，但比欧洲半球宽。半球形状的最大受试者间变异性区域存在于每个样本的枕叶和颞叶。在（i）右顶下小叶中发现了与这种一般模式的偏离（欧洲半球比日本人更易变），（ii）中央前回和中央后回的下三分之一（女性日本人的大脑半球比其他样本更少变化），（iii）右额下回（男性的欧洲半球比其他样本更易变），和（iv）额叶的极部（女性的欧洲半球比其他样本更易变）。女性大脑半球之间受试者间变异性的分布不对称性低于男性。男性的日本半球比女性的日本半球短而宽，而欧洲半球则表现出相反的性别关系。这些结果表明，半球形状显示出相当大的个体间变异性，这不是随机分布在皮层表面，但显示出不同的区域的较高的变异性。尽管存在这种受试者间的差异，但在半球形状上存在显著的种族间和性别相关差异，如果必须将个体大脑扭曲为单个或平均参考大脑或构建现实的大脑模型，则这可能是相关的（C）2001年学术出版社。
Hemispheric shape is studied using magnetic resonance imaging and 3-D reconstructions in right-handed, male and female, European and Japanese subjects. Japanese hemispheres are relatively shorter, but wider than European hemispheres. Regions of maximal intersubject variability in hemispheric shape are present in the occipital and temporal lobes in each sample. Deviations from this general pattern are found in the (i) right inferior parietal lobule (European hemispheres are more variable than Japanese), (ii) lower third of the pre- and postcentral gyri (female Japanese hemispheres are less variable than the other samples), (iii) right inferior frontal gyrus (male European hemispheres are more variable than the other samples), and (iv) polar part of the frontal lobe (female European hemispheres are less variable than the other samples). The distribution of intersubject variability between the hemispheres is less asymmetric in female than male brains. Male Japanese hemispheres are shorter but wider than female Japanese hemispheres, whereas European hemispheres show the inverse gender relations. These results demonstrate that hemispheric shape shows a considerable intersubject variability, which is not randomly distributed over the cortical surface but displays distinct regions of higher variability. Despite this intersubject variability significant interethnic- and gender-related differences in hemispheric shape are present, which may be relevant if individual brains have to be warped to a single or mean reference brain or realistic brain models are to be constructed, (C) 2001 Academic Press.