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首页> 外文期刊>Human brain mapping >Regional cerebral blood flow correlations of somatosensory areas 3a, 3b, 1, and 2 in humans during rest: A PET and cytoarchitectural study.
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Regional cerebral blood flow correlations of somatosensory areas 3a, 3b, 1, and 2 in humans during rest: A PET and cytoarchitectural study.

机译：人体休息期间人体感觉区域3a，3b，1和2的区域性脑血流相关性：一项PET和细胞结构研究。

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摘要

The concept of functional connectivity relies on the assumption that cortical areas that are directly anatomically connected will show correlations in regional blood flow (rCBF) or regional metabolism. We studied correlations of rCBF of cytoarchitectural areas 3a, 3b, 1, and 2 in the brains of 37 subjects scanned with PET during a rest condition. The cytoarchitectural areas, delineated from 10 postmortem brains with statistical methods, were transformed into the same standard anatomical format as the resting PET images. In areas 3a, 3b, and 1, somatotopically corresponding regions were intercorrelated. Area 2 was correlated with the dorsal pre-motor area. These results were in accordance with the somatosensory connectivity in macaque monkeys. In contrast, we also found correlations between areas 3b and 1 with area 4a, and SMA, and among the left and right hand sector of areas 3a, 3b, and 1. Furthermore, there were no correlations between areas 3b, 1, and 2 with SII or other areas in the parietal operculum, nor of other areas known to be directly connected with areas 3a, 3b, 1, and 2 in macaques. This indicates that rCBF correlations between cortical areas during the rest state only partly reflect their connectivity and that this approach lacks sensitivity and is prone to reveal spurious or indirect connectivity. Hum. Brain Mapping 19:183-196, 2003.
机译：功能连通性的概念基于以下假设：直接解剖连接的皮质区域将显示区域血流量（rCBF）或区域新陈代谢的相关性。我们研究了在休息状态下用PET扫描的37位受试者的大脑中细胞结构区域3a，3b，1和2的rCBF的相关性。用统计学方法从10个死后大脑划定的细胞结构区域被转换为与静止PET图像相同的标准解剖格式。在区域3a，3b和1中，体位对应区域相互关联。区域2与背运动前区域相关。这些结果与猕猴的体感连接性一致。相反，我们还发现区域3b和1与区域4a和SMA之间以及区域3a，3b和1的左右手之间的相关性。此外，区域3b，1和2之间也没有相关性。与SII或顶盖的其他区域，或与猕猴中的区域3a，3b，1和2直接相连的其他区域。这表明在静止状态期间，皮质区域之间的rCBF相关性仅部分反映了它们的连通性，并且该方法缺乏敏感性，并且易于揭示虚假或间接的连通性。哼。 Brain Mapping 19：183-196，2003。

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