Electroencephalography: Comparability of Current Source Density Transformed and Non-Transformed Spectral Measures

Primary Investigator (PI) Name

Tim Martin

Department

RCHSS - Psychological Science

Abstract

The current study assesses the correspondence between electroencephalographic (EEG) data which has undergone surface Laplacian, or current source density (CSD), transformation and data which has not. Previous literature has suggested that the transformation does not alter spectral components of EEG data to a significant degree and thus can be compared to data which has not undergone CSD transformation. In the present analysis, data was processed via CSD and was subsequently compared to the non-CSD data for a single electrode utilizing bivariate correlation as well as comparing the average amplitude in alpha, beta, delta, and theta frequencies using t tests. The results indicate that while the correlation between CSD and non-CSD data is high, (>.75) across frequencies, there remain significant differences between the two groups.

Disciplines

Biological Psychology | Cognition and Perception

This document is currently not available here.

Share

COinS
 

Electroencephalography: Comparability of Current Source Density Transformed and Non-Transformed Spectral Measures

The current study assesses the correspondence between electroencephalographic (EEG) data which has undergone surface Laplacian, or current source density (CSD), transformation and data which has not. Previous literature has suggested that the transformation does not alter spectral components of EEG data to a significant degree and thus can be compared to data which has not undergone CSD transformation. In the present analysis, data was processed via CSD and was subsequently compared to the non-CSD data for a single electrode utilizing bivariate correlation as well as comparing the average amplitude in alpha, beta, delta, and theta frequencies using t tests. The results indicate that while the correlation between CSD and non-CSD data is high, (>.75) across frequencies, there remain significant differences between the two groups.