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Cross-frequency interactions between frontal theta and posterior alpha control mechanisms foster working memory

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2018

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https://doi.org/10.1016/j.neuroimage.2018.07.067
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NeuroImage. 2018, 181, pp. 728-733. ISSN 1053-8119. eISSN 1095-9572. Available under: doi: 10.1016/j.neuroimage.2018.07.067

Zusammenfassung

Neural oscillatory activity in the theta (4-8 Hz) and alpha (8-14 Hz) bands has been associated with the implementation of executive function, with theta in midline frontal cortex and alpha in posterior parietal cortex related to working memory (WM) load. To identify how these spatially and spectrally distinct neural phenomena interact within a large-scale fronto-parietal network organized in service of WM, EEG was recorded while subjects performed an N-back WM task. Frontal theta power increase, paralleled by posterior alpha decrease, tracked participants' successful WM performance. These power fluctuations were inversely related both across and within trials and predicted reaction time, suggesting a functionally important communication channel within the fronto-parietal network. Granger causality analysis revealed directed parietal to frontal communication via alpha and frontal to parietal communication via theta. Results encourage consideration of these bidirectional, power-to-power, cross-frequency control mechanisms as an important feature of cerebral network organization supporting executive function.

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Fachgebiet (DDC)
150 Psychologie

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Working memory, Theta oscillations, Alpha oscillations, EEG, Granger causality, Connectivity

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ISO 690POPOV, Tzvetan G., Petia POPOVA, Maximilian HARKOTTE, Barbara AWISZUS, Brigitte ROCKSTROH, Gregory A. MILLER, 2018. Cross-frequency interactions between frontal theta and posterior alpha control mechanisms foster working memory. In: NeuroImage. 2018, 181, pp. 728-733. ISSN 1053-8119. eISSN 1095-9572. Available under: doi: 10.1016/j.neuroimage.2018.07.067
BibTex
@article{Popov2018Cross-42976,
  year={2018},
  doi={10.1016/j.neuroimage.2018.07.067},
  title={Cross-frequency interactions between frontal theta and posterior alpha control mechanisms foster working memory},
  volume={181},
  issn={1053-8119},
  journal={NeuroImage},
  pages={728--733},
  author={Popov, Tzvetan G. and Popova, Petia and Harkotte, Maximilian and Awiszus, Barbara and Rockstroh, Brigitte and Miller, Gregory A.}
}
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