Department of Psychology, The University of Hong Kong, Hong Kong.
Department of Psychology, The University of Hong Kong, Hong Kong
eNeuro. 2022 Nov 23;9(6). doi: 10.1523/ENEURO.0232-22.2022. Print 2022 Nov-Dec.
A significant proportion of the human neurotypical population exhibits some degree of sensory eye dominance (SED), referring to the brain's preferential processing of one eye's input versus another. The neural substrates underlying this functional imbalance are not well known. Here, we investigated the relationship between visual white matter tract properties and SED in the human neurotypical population. Observers' performance on two commonly used dichoptic tasks were used to index SED, along with performance on a third task to address a functional implication of binocular imbalance: stereovision. We show that diffusivity metrics of the optic radiations (ORs) well predict behavioral SED metrics. We found no relationship between SED and stereosensitivity. Our data suggest that SED is not simply reflected by gray matter structural and functional alterations, as often suggested, but relates, at least in part to the microstructural properties of thalamocortical white matter.
相当一部分神经典型人群表现出一定程度的感觉眼优势（SED），指的是大脑对一只眼睛的输入与另一只眼睛的输入的优先处理。这种功能失衡的神经基础尚不清楚。在这里，我们研究了人类神经典型人群中视觉白质束特性与 SED 之间的关系。观察者在两个常用的双眼竞争任务上的表现用于指标 SED，同时在第三个任务上的表现用于解决双眼不平衡的功能影响：立体视觉。我们表明，视辐射（OR）的扩散度量很好地预测了行为 SED 度量。我们没有发现 SED 和立体视觉灵敏度之间的关系。我们的数据表明，SED 不是像通常认为的那样简单地反映了灰质结构和功能的改变，而是与至少部分与丘脑皮质白质的微观结构特性有关。
