Gray Matter Volume in Different Cortical Structures Dissociably Relates to Individual Differences in Capacity and Precision of Visual Working Memory.
Gray Matter Volume in Different Cortical Structures Dissociably Relates to Individual Differences in Capacity and Precision of Visual Working Memory.
复制标题
DOI：
10.1093/cercor/bhaa046
复制
发表时间：
2020-04
期刊：
影响因子：
3.7
通讯作者：
Maro G. Machizawa;J. Driver;Takeo Watanabe
中科院分区：
文献类型：
--
作者：
Maro G. Machizawa;J. Driver;Takeo Watanabe
视觉工作记忆(VWM)指的是我们有选择地将视觉信息保持在心理表征中的能力。虽然VWM的认知极限对各种心理操作有很大的影响，但关于头脑中表征的数量或质量是否会制约VWM仍存在争议。在这里，我们研究了行为与大脑的解剖关系，以及大脑活动与大脑解剖的关系，以及与VWM保留间隔特定的“神经”标记的关系。我们的结果一致地表明，在VWM中保持更多项目的个体倾向于在其左侧枕部区域有更大的灰质(GM)体积。相比之下，保持高精度记忆的能力更强的人，其右顶叶的GM体积往往更大。这些结果表明，VWM在数量和质量上的个体差异可能以一种可分离的方式与区域GM体积相关，表明VWM中信息的故意整合可能招募到可分离的皮质亚系统。
Visual working memory (VWM) refers to our ability to selectively maintain visual information in a mental representation. While cognitive limits of VWM greatly influence a variety of mental operations, it remains controversial whether the quantity or quality of representations in mind constrains VWM. Here, we examined behavior-to-brain anatomical relations as well as brain activity to brain anatomy associations with a "neural" marker specific to the retention interval of VWM. Our results consistently indicated that individuals who maintained a larger number of items in VWM tended to have a larger gray matter (GM) volume in their left lateral occipital region. In contrast, individuals with a superior ability to retain with high precision tended to have a larger GM volume in their right parietal lobe. These results indicate that individual differences in quantity and quality of VWM may be associated with regional GM volumes in a dissociable manner, indicating willful integration of information in VWM may recruit separable cortical subsystems.