| Zugriffsnummer | 14972 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Unsupervised identification of spontaneous magnetoencephalographic alpha activity by Independent Component Analysis |
| Autor(in); Institution |
Sander-Thömmes, Tilmann; 8.21, Bioelektrizität und -magnetismus, PTB-Berlin
Burghoff, Martin; 8.21, Bioelektrizität und -magnetismus, PTB-Berlin
Lüschow, Andreas; AG Neurophysik, Universitätsklinikum Benjamin Franklin, FU Berlin, GERMANY
Curio, Gabriel; Neurophysics Group, Dept. of Neurology, Universitätsklinikum Benjamin Franklin, FU Berlin, GERMANY
Trahms, Lutz; 8.21, Bioelektrizität und -magnetismus, PTB-Berlin
|
| Quelle/Jahr | BIOMAG 2002 : 13th International Conference on Biomagnetism:(2002), 991 - 993 |
| ISBN | 3-8007-2714-5 |
| Verlag | Berlin ; Offenbach: VDE Verlag |
| Konferenzangaben | BIOMAG 2002 : 13th International Conference on Biomagnetism, Jena, August 10-14, 2002, Germany |
| Freie Schlagworte | Magnetoencencephalographic ; Time-delayed decorrelation |
| Zusammenfassung | Information processing in the brain involves oscillatory electrical signals which can be measured using multichannel electro- or magnetoencephalography (MEG). Best studied are occipital alpha- and pericentral mu-rhythms with frequencies at 10 Hz and its higher harmonics. Here, we analysed continuous MEG recordings from a visual memory task using Independent Component Analysis (ICA), which separates statistically independent sources in multichannel recordings without a priori knowledge. ICA isolated several oscillatory brain sources. A subsequent localisation using the dipole in a conducting sphere model gave the location of the sources on the cortex with a high goodness of fit. One of the sources could be identified as pericentral mu-oscillations due to a suppression and a rebound of the oscillations triggered by motor activity. |
Zitierung
Sander-Thömmes, T., Burghoff, M., Lüschow, A., Curio, G., & Trahms, L. (2002). Unsupervised identification of spontaneous magnetoencephalographic alpha activity by Independent Component Analysis. BIOMAG 2002 : 13th International Conference on Biomagnetism, Jena, August 10-14, 2002, Germany.