Gender-specific left-right asymmetries in human visual cortex
Gender-specific left-right asymmetries in human visual cortex
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DOI：
10.1523/jneurosci.4753-06.2007
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发表时间：
2007-02-07
影响因子：
5.3
通讯作者：
Zilles, Karl
中科院分区：
文献类型：
--
作者：
Amunts, Katrin;Armstrong, Este;Zilles, Karl
视觉空间处理中性别差异的结构相关性基本上是未知的。我们对人类初级视皮层[V1/Brodmann区17（BA 17）]、邻近区V2（BA 18）以及运动敏感复合体（V5/MT +/h 0 c5）的细胞结构相关性的定量分析表明，视觉区具有性别二态性，并且二态性的类型在各区域之间不同。性别差异存在于h 0 c5体积的半球间不对称性和h 0 c5与BA 17的右半球体积比中，该区域投影到V5/MT +/h 0 c5。在h 0 c5的表面积中也观察到不对称性，但在其皮质厚度中没有观察到。这种差异给男性提供了更多的空间来处理额外的信息，这一发现与上级男性在特定的视觉空间任务（如心理旋转）中的处理能力相一致。h 0 c5的性别差异存在类似的体积分数的细胞体，这意味着，总体而言，视觉神经回路是相似的男性和女性。
The structural correlates of gender differences in visuospatial processing are essentially unknown. Our quantitative analysis of the cytoarchitecture of the human primary visual cortex [V1/Brodmann area 17 (BA17)], neighboring area V2 (BA18), and the cytoarchitectonic correlate of the motion-sensitive complex (V5/MT +/h0c5) shows that the visual areas are sexually dimorphic and that the type of dimorphism differs among the areas. Gender differences exist in the interhemispheric asymmetry of h0c5 volumes and in the righthemispheric volumetric ratio of h0c5 to BA17, an area that projects to V5/MT +/h0c5. Asymmetry was also observed in the surface area of h0c5 but not in its cortical thickness. The differences give males potentially more space in which to process additional information, a finding consistent with superior male processing in particular visuospatial tasks, such as mental rotation. Gender differences in h0c5 exist with similar volume fractions of cell bodies, implying that, overall, the visual neural circuitry is similar in males and females.