Abstract
This paper presents a new method to estimate the scalp Laplacian EEG from scalp potentials on a realistic geometry scalp surface. The mathematical potential distribution on the realistically shaped scalp is constructed using a three-dimensional spline, and the mathematical scalp geometry model is constructed using a two-dimensional spline. The performance of the proposed method is evaluated by computer simulations using the three-concentric-sphere head model. The feasibility of the present method has also been tested in visual-evoked potentials recorded in a human subject. The present simulation and experimental data suggest that the proposed method provides an alternative to estimating the surface Laplacian from potentials over a realistic-geometry scalp.
Original language | English (US) |
---|---|
Pages (from-to) | 633-640 |
Number of pages | 8 |
Journal | Electromagnetics |
Volume | 21 |
Issue number | 7-8 |
DOIs | |
State | Published - Dec 1 2001 |
Keywords
- 2D and 3D spline
- High-resolution EEG
- Local Cartesian coordinate system
- Realistic geometry Laplacian
- Surface Laplacian estimate
- VEP