Abstract
The purpose of this study is to propose models in which both magnetoencephalogram (MEG) and electroencephalogram (EEG) activities evoked by color imagination are recorded simultaneously. The components of magnetic fields perpendicular to the surface of a head were measured by using a dc SQUID with a first-derivative gradiometer. We observed that both MEG and EEG activities were affected by color imagination. The power spectrum of MEG evoked by color imagination showed a single sharp peak at 11 Hz. In contrast, the power spectrum of EEG showed broad patterns. The EEG topography showed that the spectrum component at 11 Hz dominated in the occipital region. On the basis of the results, we proposed a two-dipole model whose directions vary with time to explain the change in EEG topography evoked by color imagination.
| Original language | English |
|---|---|
| Pages (from-to) | 169-170 |
| Number of pages | 2 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 16 |
| Issue number | pt 1 |
| Publication status | Published - Dec 1 1994 |
| Event | Proceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA Duration: Nov 3 1994 → Nov 6 1994 |
All Science Journal Classification (ASJC) codes
- Signal Processing
- Biomedical Engineering
- Computer Vision and Pattern Recognition
- Health Informatics