Neural Determinants of Task Performance during Feature-Based Attention in Human Cortex

被引:13
作者
Jigo, Michael [1 ,2 ]
Gong, Mengyuan [1 ]
Liu, Taosheng [1 ]
机构
[1] Michigan State Univ, Dept Psychol, 316 Phys Rd, E Lansing, MI 48824 USA
[2] NYU, Ctr Neural Sci, New York, NY 10003 USA
基金
美国国家卫生研究院;
关键词
covert attention; fMRI; frontoparietal cortex; multivariate analysis; TMS; SPATIAL ATTENTION; VISUAL-ATTENTION; PRIORITY SIGNALS; HUMAN BRAIN; REPRESENTATION; MECHANISMS; AREAS; ORGANIZATION; MODULATIONS; PERCEPTION;
D O I
10.1523/ENEURO.0375-17.2018
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Studies of feature-based attention have associated activity in a dorsal frontoparietal network with putative attentional priority signals. Yet, how this neural activity mediates attentional selection and whether it guides behavior are fundamental questions that require investigation. We reasoned that endogenous fluctuations in the quality of attentional priority should influence task performance. Human subjects detected a speed increment while viewing clockwise (CW) or counterclockwise (CCW) motion (baseline task) or while attending to either direction amid distracters (attention task). In an fMRI experiment, direction-specific neural pattern similarity between the baseline task and the attention task revealed a higher level of similarity for correct than incorrect trials in frontoparietal regions. Using transcranial magnetic stimulation (TMS), we disrupted posterior parietal cortex (PPC) and found a selective deficit in the attention task, but not in the baseline task, demonstrating the necessity of this cortical area during feature-based attention. These results reveal that frontoparietal areas maintain attentional priority that facilitates successful behavioral selection.
引用
收藏
页数:15
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