期刊
JOURNAL OF NEUROSCIENCE
卷 37, 期 15, 页码 4117-4127出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.3015-16.2017
关键词
alpha gamma oscillations; executive control; Flanker task; functional connectivity; magnetoencephalography; prefrontal control
资金
- Netherlands Organization for Scientific Research (NWO VICI) [453-09-002]
- National Institutes of Health [R01-MH64043, R01-EY017699]
- National Science Foundation [BCS-132827]
- James S. McDonnell Foundation [220020448]
Recent findings in the visual system of nonhuman primates have demonstrated an important role of gamma-band activity (40 -100 Hz) in the feedforward flow of sensory information, whereas feedback control appears to be established dynamically by oscillations in the alpha (8 -13 Hz) and beta (13-18 Hz) bands (van Kerkoerle et al., 2014; Bastos et al., 2015). It is not clear, however, how alpha oscillations are controlled and how they interact with the flow of visual information mediated by gamma-band activity. Using noninvasive human MEG recordings in subjects performing a visuospatial attention task, we show that fluctuations in alpha power during a delay period in a spatial attention task preceded subsequent stimulus-driven gamma-band activity. Importantly, these interactions correlated with behavioral performance. Using Granger analysis, we further show that the right frontal-eye field (rFEF) exerted feedback control of the visual alpha oscillations. Our findings suggest that alpha oscillations controlled by the FEF route cortical information flow by modulating gamma-band activity.
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