Cross-frequency interactions between frontal theta and posterior alpha control mechanisms foster working memory
| Autor: | Tzvetan Popov, Gregory A. Miller, Barbara Awiszus, Brigitte Rockstroh, Maximilian Harkotte, Petia Popova |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Frontal cortex Cognitive Neuroscience Alpha (ethology) Posterior parietal cortex Electroencephalography Theta power 050105 experimental psychology 03 medical and health sciences Executive Function Young Adult 0302 clinical medicine Parietal Lobe medicine Humans 0501 psychology and cognitive sciences Theta Rhythm Control (linguistics) Granger causality analysis medicine.diagnostic_test Working memory Functional Neuroimaging 05 social sciences Frontal Lobe Alpha Rhythm Memory Short-Term Neurology Female Nerve Net Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | NeuroImage. 181 |
| ISSN: | 1095-9572 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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