Sex differences in parietal lobe morphology: relationship to mental rotation performance.
Sex differences in parietal lobe morphology: relationship to mental rotation performance.
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DOI：
10.1016/j.bandc.2008.09.004
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发表时间：
2009-04
影响因子：
2.5
通讯作者：
Nopoulos, Peg
中科院分区：
文献类型：
--
作者：
Koscik, Tim;O'Leary, Dan;Moser, David J.;Andreasen, Nancy C.;Nopoulos, Peg
对人脑的结构磁共振成像(MRI)研究报告了性别二型性的证据。除了大脑总体积的性别差异外，灰质(GM)与白质(WM)体积的比例也有差异，尤其是在顶叶。据我们所知，还没有研究探讨顶叶结构和功能的性别差异之间的关系。顶叶被认为与空间能力有关，特别是与心理旋转有关。这项研究的目的是检验顶叶结构是否存在性别差异，如果存在，则将这些差异与心理旋转测试(MRT)的表现联系起来。我们发现女性顶叶的灰质体积比男性大，这种形态上的差异对女性在MRT上的表现是不利的。相反，我们发现与女性相比，男性的顶叶表面积按比例更大，这种形态差异与男性在心理旋转方面的表现优势有关。这些发现支持了这样一种可能性，即顶叶结构中的性别二型性是心理旋转测试中性别差异的神经生物学基础。
Structural magnetic resonance imaging (MRI) studies of the human brain have reported evidence for sexual dimorphism. In addition to sex differences in overall cerebral volume, differences in the proportion of gray matter (GM) to white matter (WM) volume have been observed, particularly in the parietal lobe. To our knowledge there have been no studies examining the relationship between the sex differences in parietal lobe structure and function. The parietal lobe is thought to be involved in spatial ability, and particularly involved in mental rotation. The purpose of this study is to examine whether sex differences in parietal lobe structure are present, and if present to relate these differences to performance on the Mental Rotations Test (MRT). We found that women had proportionately greater gray matter volume in the parietal lobe compared to men, and this morphologic difference was disadvantageous for women in terms of performance on the MRT. In contrast, we found that men compared to women had proportionately greater parietal lobe surface area, and this morphologic difference was associated with a performance advantage for men on mental rotation. These findings support the possibility that the sexual dimorphism in the structure of the parietal lobe is a neurobiological substrate for the sex difference in performance on the Mental Rotations Test.
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COLLINS, DL;NEELIN, P;EVANS, AC
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