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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Retinotopic mapping of lateral geniculate nucleus in humans using functional magnetic resonance imaging
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Retinotopic mapping of lateral geniculate nucleus in humans using functional magnetic resonance imaging

机译：使用功能性磁共振成像对人外侧膝状核进行视网膜定位

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摘要

Subcortical nuclei in the thalamus, which play an important role in many functions of the human brain, provide challenging targets for functional mapping with neuroimaging techniques because of their small sizes and deep locations. In this study, we explore the capability of high-resolution functional magnetic resonance imaging at 4 Tesla for mapping the retinotopic organization in the lateral genic-ulate nucleus (LGN). Our results show that the hemifield visual stimulation only activates LGN in the contralateral hemisphere, and the lower-field and upper-field visual stimulations activate the superior and inferior portion of LGN, respectively. These results reveal a similar retinotopic organization between the human and nonhuman primate LGN and between LGN and the primary visual cortex. We conclude that high-resolution functional magnetic resonance imaging is capable of functional mapping of suborganizations in small nuclei together with cortical activation. This will have an impact for studying the thalamocortical networks in the human brain.
机译：丘脑的皮层下核在人脑的许多功能中起着重要作用，由于它们的体积小且位置深，为使用神经成像技术进行功能作图提供了具有挑战性的目标。在这项研究中，我们探索了在4特斯拉处进行高分辨率功能磁共振成像的能力，可绘制出侧向基因齿状核（LGN）中的视网膜组织。我们的结果表明，半场视觉刺激仅激活对侧半球的LGN，而低场和上场视觉刺激分别激活LGN的上部和下部。这些结果揭示了人类和非人类灵长类LGN之间以及LGN与初级视觉皮层之间存在类似的视网膜组织。我们得出结论，高分辨率功能磁共振成像能够皮层激活一起对小原子核中的亚组织进行功能映射。这将对研究人脑中的丘脑皮质网络产生影响。

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