Topographic specificity of alpha power during auditory spatial attention

被引:55
|
作者
Deng, Yuqi [1 ]
Choi, Inyong [2 ]
Shinn-Cunningham, Barbara [1 ,3 ]
机构
[1] Boston Univ, Dept Biomed Engn, Boston, MA 02215 USA
[2] Univ Iowa, Dept Commun Sci & Disorders, Iowa City, IA 52242 USA
[3] Carnegie Mellon Univ, Carnegie Mellon Neurosci Inst, Pittsburgh, PA 15213 USA
基金
美国国家卫生研究院;
关键词
Electroencephalography; Selective attention; Human behavior; Parietal cortex; RIGHT-HEMISPHERE DOMINANCE; INTERAURAL TIME DIFFERENCES; BAND ACTIVITY; WORKING-MEMORY; EEG ALPHA; TOP-DOWN; SELECTIVE ATTENTION; ENERGETIC MASKING; MU RHYTHM; PARIETAL;
D O I
10.1016/j.neuroimage.2019.116360
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Visual and somatosensory spatial attention both induce parietal alpha (8-14 Hz) oscillations whose topographical distribution depends on the direction of spatial attentional focus. In the auditory domain, contrasts of parietal alpha power for leftward and rightward attention reveal qualitatively similar lateralization; however, it is not clear whether alpha lateralization changes monotonically with the direction of auditory attention as it does for visual spatial attention. In addition, most previous studies of alpha oscillation did not consider individual differences in alpha frequency, but simply analyzed power in a fixed spectral band. Here, we recorded electroencephalography in human subjects when they directed attention to one of five azimuthal locations. After a cue indicating the direction of an upcoming target sequence of spoken syllables (yet before the target began), alpha power changed in a task-specific manner. Individual peak alpha frequencies differed consistently between central electrodes and parieto-occipital electrodes, suggesting multiple neural generators of task-related alpha. Parieto-occipital alpha increased over the hemisphere ipsilateral to attentional focus compared to the contralateral hemisphere, and changed systematically as the direction of attention shifted from far left to far right. These results showing that parietal alpha lateralization changes smoothly with the direction of auditory attention as in visual spatial attention provide further support to the growing evidence that the frontoparietal attention network is supramodal.
引用
收藏
页数:10
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