Local polynomial estimate of surface Laplacian.
- Authors
- Wang, K; Begleiter, H
- Year
- 1999
- Journal
- Brain topography
- PMID
- 10582562
- DOI
- 10.1023/a:1022225522447
This paper describes a method for estimating the surface Laplacian of brain potentials. The method consists of two steps: local surface approximation by its tangent plane and local polynomial fitting. Compared to previous methods for estimating surface Laplacian, this method has some new features. First, it can estimate the surface Laplacian at any point of the scalp, including the locations of the peripheral electrodes. Secondly, it estimates the brain potential and the surface Laplacian at any point simultaneously. This reduces the risk of error propagation, which occurs when the brain potential is interpolated first and the surface Laplacian is then computed based on the interpolated brain potential. Finally, the method automatically adapts to noisy data by using more or less measurements at neighboring electrodes based on estimated noise level. Simulations suggest that this method is effective. Application to event-related potentials are also presented.
No figures extracted from this document.
No chunks β full text not yet ingested.
No entities extracted from this document yet.
No uploaded files.
No citations found.
In this knowledge base
External
| Title | Authors | Journal | Year | Link |
|---|---|---|---|---|
| Advances in Electrophysiological Research. | Kamarajan C et al. | β | 2015 | β |
| Deficient Event-Related Theta Oscillations in Individuals at Risk for Alcoholism: A Study of Reward Processing and Impulsivity Features. | Kamarajan C et al. | β | 2015 | β |
| Issues and considerations for using the scalp surface Laplacian in EEG/ERP research: A tutorial review. | Kayser J et al. | β | 2015 | β |
| Reward processing deficits and impulsivity in high-risk offspring of alcoholics: A study of event-related potentials during a monetary gambling task. | Kamarajan C et al. | β | 2015 | β |
| The use of current source density as electrophysiological correlates in neuropsychiatric disorders: A review of human studies. | Kamarajan C et al. | β | 2015 | β |
| Topography, power, and current source density of ΞΈ oscillations during reward processing as markers for alcohol dependence. | Kamarajan C et al. | β | 2012 | β |
| EEG coherence: topography and frequency structure. | Chorlian DB et al. | β | 2009 | β |
| Alcoholism is a disinhibitory disorder: neurophysiological evidence from a Go/No-Go task. | Kamarajan C et al. | β | 2005 | β |
| Complexity measures of event related potential surface Laplacian data calculated using the wavelet packet transform. | Jones K et al. | β | 2002 | β |
| Auditory P3a deficits in male subjects at high risk for alcoholism. | Hada M et al. | β | 2001 | β |
| Trilinear modeling of event-related potentials. | Wang K et al. | β | 2000 | β |