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A Parametric Model for Multichannel EEG Spectra
| Content Provider | Scilit |
|---|---|
| Author | Pascual-Marqui, Roberto D. Valdes-Sosa, Pedro A. Alvarez-Amador, Alfredo |
| Copyright Year | 1988 |
| Description | The EEG is modelled as the superposition of two component processes: the xi and the alpha processes. In the frequency domain, the xi process is always present and appears as a spectral peak with maximum amplitude at very low frequencies, while the alpha process is characterized by a spectral peak with its maximum located in the traditional alpha band (7-13 Hz), and is not necessarily always present. The multivariate properties of EEG spectra are adequately modelled with frequency independent coherence matrices for each process. Multichannel EEG studies reveal interesting properties: (1) the generalized coherence for alpha is much larger than for xi, indicating increased functional coupling for the alpha process; (2) the alpha coherence matrix has reduced dimensionality, possibly related to a small number of generators; (3) xi coherences are zero phase with magnitudes that decrease exponentially with interelectrode distance; and (4) alpha coherences have significant nonzero phase shifts. |
| Related Links | http://www.tandfonline.com/doi/pdf/10.3109/00207458808985730 |
| Ending Page | 99 |
| Page Count | 11 |
| Starting Page | 89 |
| ISSN | 00207454 |
| e-ISSN | 15435245 |
| DOI | 10.3109/00207458808985730 |
| Journal | International Journal of Neuroscience |
| Issue Number | 1-2 |
| Volume Number | 40 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 1988-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: International Journal of Neuroscience Neurosciences Functional Frequency Multichannel Coherence Alpha Modelled Eeg Spectra |
| Content Type | Text |
| Resource Type | Article |
| Subject | Neuroscience Medicine |
