Reid S N, Juraska J M
Neuroscience Program, University of Illinois, Champaign-Urbana 61820.
J Comp Neurol. 1992 Jul 15;321(3):442-7. doi: 10.1002/cne.903210310.
The pervasiveness of sex differences in the size of the rat cerebral cortex was investigated in ten littermate pairs of socially housed Long-Evans hooded rats at 90 days of age. Overall, the cortex was longer and wider in male than in female rats. Sex differences were detected in most cortical regions with this sample size; the exception was the temporal cortex. While some asymmetries were found, they did not vary with the sex of the animal nor were they consistently in one direction. The contribution of the cortical layers to sex differences in cortical thickness was examined in four locations: the primary motor cortex, the forelimb area of the sensorimotor cortex and the monocular and the binocular areas of the visual cortex. The layers that showed sex differences varied among the areas but were confined to layers II-III, V and VI. Sex differences in cortical size were widespread in the adult rat but showed some regional and laminar specificity.
在90日龄的十对同窝饲养的社会群居长 Evans 有帽大鼠中，研究了大鼠大脑皮层大小性别差异的普遍性。总体而言，雄性大鼠的皮层比雌性大鼠更长更宽。在这个样本量下，大多数皮层区域都检测到了性别差异；颞叶皮层除外。虽然发现了一些不对称性，但它们并不随动物的性别而变化，也并非始终朝着一个方向。在四个部位检查了皮层各层对皮层厚度性别差异的贡献：初级运动皮层、感觉运动皮层的前肢区域以及视觉皮层的单眼和双眼区域。显示出性别差异的层在不同区域有所不同，但局限于II - III层、V层和VI层。成年大鼠皮层大小的性别差异广泛存在，但表现出一些区域和层特异性。
