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有证据表明,在健康成年人中,用于视觉运动感知的皮下快捷方式的自适应性髓化

Elise G Rowe¹, Yubing Zhang¹, Marta I Garrido^1,2

¹Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, Victoria, Australia.

Human brain mapping

|August 23, 2023

概括

研究人员使用MRI绘制了大脑中无意识的视觉路径. 在LGN-MT路径显示了更大的髓化,表明更快的信号传输,可能是由于频繁使用.

科学领域:

神经科学是一个神经科学.
视觉处理视觉处理
大脑的连接性大脑的连接性

背景情况:

意识的视觉运动处理涉及一个皮质通路 (视网膜-LGN-V1-MT).
假设皮下通路 (视网膜-PUL-MT和LGN-MT) 携带无意识的视觉信息,绕过V1.
以前的证据仅限于非人类灵长类动物和小型人类研究.

研究的目的:

在一个大样本的神经类型人类中,重建和分析皮层下视觉通路 (PUL-MT和LGN-MT) 的髓化.
为了研究途径结构,髓化和潜在的信息流速之间的关系.

主要方法:

利用了来自人类结合体项目的扩散磁共振成像 (dMRI) 数据 (7T和3T数据集).
重建的脉动-MT (PUL-MT) 和横向生殖核-MT (LGN-MT) 途径.
分析了纤维通道密度和髓化水平.

主要成果:

在左半球为PUL-MT路径确定了更多的纤维带,在左半球具有更高的密度.
发现双边的LGN-MT通道比PUL-MT通道更为多重的髓化.
在LGN-MT中较高的髓化表明信号转导速度更快.

结论:

在LGN-MT路径表现出更大的髓化,表明潜在的更快的信号传输无意识的视觉信息.
这种髓化可能是由于更频繁的途径利用而导致的"适应性髓化".
这些发现有助于理解无意识视觉处理和大脑可塑性的神经基础.

关键词:

在DTI中,DTI是指DTI.没有LGN LGN 在这个过程中,MTTMTTM 盲目视力盲目视力盲目视力扩散扩散是一种扩散.运动感知感知运动感知普尔维纳尔 (Pulvinar) 是一个火车站.皮肤下皮层的途径.曲谱学曲谱学曲谱学曲谱学视觉运动视觉运动

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