Top-down control of the left visual field bias in cued visual spatial attention.
Top-down control of the left visual field bias in cued visual spatial attention.
复制标题
自上而下控制提示视觉空间注意力中的左视野偏差。
DOI：
10.1093/cercor/bhac402
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Ding,Mingzhou
中科院分区：
文献类型：
--
作者：
Meyyappan,Sreenivasan;Rajan,Abhijit;Mangun,GeorgeR;Ding,Mingzhou
据报道，人类在知觉判断、反应速度和辨别准确性方面存在左视野（LVF）偏差。众所周知，视觉空间注意力等认知因素可以调节甚至消除这种偏见。我们通过在提示视觉空间注意任务中记录瞳孔测量和功能磁共振成像（fMRI）来研究这个问题。我们观察到：（i）在“右听”提示后，瞳孔放大程度明显大于“左听”提示；（ii）“左听”和“右听”试验之间的任务表现（例如反应时间[RT]）没有差异；（iii）“左听”和“右听”试验之间与提示相关的瞳孔扩张差异与相应的 RT 差异呈负相关。从神经科学角度来看，将线索相关的瞳孔扩张的差异与相应的线索相关的功能磁共振成像差异联系起来，主要在右半球产生激活，包括右侧顶内沟和右侧腹外侧前额叶皮层。这些结果表明，（i）视觉空间注意力控制存在不对称性，向右注意控制比向左注意控制更费力，（ii）这种不对称性是 LVF 偏差减少或消除的基础，（iii）右半球注意力控制网络的组成部分可能是观察到的注意力控制不对称性的神经基础的一部分。
A left visual field (LVF) bias in perceptual judgments, response speed, and discrimination accuracy has been reported in humans. Cognitive factors, such as visual spatial attention, are known to modulate or even eliminate this bias. We investigated this problem by recording pupillometry together with functional magnetic resonance imaging (fMRI) in a cued visual spatial attention task. We observed that (i) the pupil was significantly more dilated following attend-right than attend-left cues, (ii) the task performance (e.g. reaction time [RT]) did not differ between attend-left and attend-right trials, and (iii) the difference in cue-related pupil dilation between attend-left and attend-right trials was inversely related to the corresponding difference in RT. Neuroscientically, correlating the difference in cue-related pupil dilation with the corresponding cue-related fMRI difference yielded activations primarily in the right hemisphere, including the right intraparietal sulcus and the right ventrolateral prefrontal cortex. These results suggest that (i) there is an asymmetry in visual spatial attention control, with the rightward attention control being more effortful than the leftward attention control, (ii) this asymmetry underlies the reduction or the elimination of the LVF bias, and (iii) the components of the attentional control networks in the right hemisphere are likely part of the neural substrate of the observed asymmetry in attentional control.