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首页> 外文期刊>The European Journal of Neuroscience >Magnetoencephalography indicates finger motor somatotopy.
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Magnetoencephalography indicates finger motor somatotopy.

机译：脑磁图显示手指运动体检。

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The existence or non-existence of fine-scale motor somatotopy of the hand is a fundamental problem with regard to the functioning of the human brain. In contrast to seldom contradicted early twentieth century descriptions of activation overlap, descriptions of finger motor somatotopy faced disagreement. Recent blood-flow-related brain mapping data achieved with functional magnetic resonance imaging (fMRI) argue in favour of fine-scale somatotopy. However, considerable discrepancies between blood oxygen-level-dependent fMRI activations and intracortically recorded neuronal activity have been reported and it is unclear whether the blood flow results truly reflect the neuronal situation. We have used recent advances in magnetoencephalography to detect signals deriving directly from neuronal tissue. Besides replication of the overlap aspect, we found statistically significant evidence for the existence of a somatotopic aspect of human hand motor representation when comparing the fifth and first finger motor dipoles along the superior-inferior axis. The average location of the fifth finger was found to be 2.31 mm superior to the first finger.
机译：关于人类大脑的功能，手的精细运动体解剖学的存在与否是一个基本问题。与二十世纪初期很少有矛盾的关于激活重叠的描述相反，手指运动体素的描述面临分歧。利用功能磁共振成像（fMRI）获得的与血流相关的最新大脑图谱数据主张采用精细的躯体解剖学。然而，已经报道了依赖于血氧水平的fMRI激活与皮层内记录的神经元活动之间的巨大差异，并且尚不清楚血流结果是否真正反映了神经元状况。我们已经利用脑磁图技术的最新进展来检测直接来自神经元组织的信号。除了重叠方面的复制外，当比较沿上下轴的第五和第一手指运动偶极子时，我们发现了人类手运动代表的体位方面存在统计学意义的证据。发现第五根手指的平均位置比第一根手指高2.31 mm。

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