School of Psychology, South China Normal University, 510631 Guangzhou, PR China; Center for Studies of Psychological Application, South China Normal University, 510631 Guangzhou, PR China; Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, 510631 Guangzhou, PR China; Department of Psychology, Gannan Medical University, 341000 Ganzhou, PR China.
School of Psychology, South China Normal University, 510631 Guangzhou, PR China; Center for Studies of Psychological Application, South China Normal University, 510631 Guangzhou, PR China; Guangdong Key Laboratory of Mental Health and Cognitive Science, South China Normal University, 510631 Guangzhou, PR China.
Neuropsychologia. 2019 Jun;129:37-46. doi: 10.1016/j.neuropsychologia.2019.03.007. Epub 2019 Mar 15.
The neural networks involved in number line bisection are poorly understood. We used functional magnetic resonance imaging (fMRI) to investigate these. fMRI was analyzed from 28 healthy volunteers who performed number and physical line bisection tasks (and their respective baselines). Whole brain analyses showed that these two bisection tasks shared common neural correlates in bilateral parietal-frontal networks; furthermore, bilateral parietal-frontal areas, right cerebellum, left insula and supplementary motor area (SMA) showed higher activity when contrasting the number line with a physical line bisection task. Importantly, psychophysiological interaction (PPI) analyses further indicated that left SMA and right cerebellum were connected to parietal-frontal areas for implementing the number line bisection task. Our findings suggested that a visuospatial attention control system was recruited, and mental imagery of a number line was used to find the midpoint of a numerical interval without calculations.
数量线二分涉及的神经网络尚未被充分理解。我们使用功能磁共振成像（fMRI）对此进行了研究。对 28 名健康志愿者进行 fMRI 分析，他们执行了数量线和物理线二分任务（及其各自的基线）。全脑分析表明，这两个二分任务在双侧顶-额网络中共享共同的神经相关物；此外，当对比数量线和物理线二分任务时，双侧顶叶-额叶区域、右小脑、左岛叶和补充运动区（SMA）显示出更高的活动。重要的是，心理生理交互（PPI）分析进一步表明，左 SMA 和右小脑与顶-额叶区域相连，用于执行数量线二分任务。我们的发现表明，一个视空间注意力控制系统被招募，并且使用数量线的心理意象来找到数值区间的中点，而无需计算。
