EEG Oscillatory Phase-Dependent Markers of Corticospinal Excitability in the Resting Brain
Joint Authors
Sauseng, Paul
Minarik, Tamas
Hummel, Friedhelm C.
Berger, Barbara
Liuzzi, Gianpiero
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-11
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Functional meaning of oscillatory brain activity in various frequency bands in the human electroencephalogram (EEG) is increasingly researched.
While most research focuses on event-related changes of brain activity in response to external events there is also increasing interest in internal brain states influencing information processing.
Several studies suggest amplitude changes of EEG oscillatory activity selectively influencing cortical excitability, and more recently it was shown that phase of EEG activity (instantaneous phase) conveys additional meaning.
Here we review this field with many conflicting findings and further investigate whether corticospinal excitability in the resting brain is dependent on a specific spontaneously occurring brain state reflected by amplitude and instantaneous phase of EEG oscillations.
We applied single pulse transcranial magnetic stimulation (TMS) over the left sensorimotor cortex, while simultaneously recording ongoing oscillatory activity with EEG.
Results indicate that brain oscillations reflect rapid, spontaneous fluctuations of cortical excitability.
Instantaneous phase but not amplitude of oscillations at various frequency bands at stimulation site at the time of TMS-pulse is indicative for brain states associated with different levels of excitability (defined by size of the elicited motor evoked potential).
These results are further evidence that ongoing brain oscillations directly influence neural excitability which puts further emphasis on their role in orchestrating neuronal firing in the brain.
American Psychological Association (APA)
Berger, Barbara& Minarik, Tamas& Liuzzi, Gianpiero& Hummel, Friedhelm C.& Sauseng, Paul. 2014. EEG Oscillatory Phase-Dependent Markers of Corticospinal Excitability in the Resting Brain. BioMed Research International،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-509544
Modern Language Association (MLA)
Berger, Barbara…[et al.]. EEG Oscillatory Phase-Dependent Markers of Corticospinal Excitability in the Resting Brain. BioMed Research International No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-509544
American Medical Association (AMA)
Berger, Barbara& Minarik, Tamas& Liuzzi, Gianpiero& Hummel, Friedhelm C.& Sauseng, Paul. EEG Oscillatory Phase-Dependent Markers of Corticospinal Excitability in the Resting Brain. BioMed Research International. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-509544
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-509544