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Chunk #24 — Methods — CSD methods — CSD-PCA

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Novelty P3 reductions in depression: characterization using principal components analysis (PCA) of current source density (CSD) waveforms.
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3b, column 3), followed by a parietal P3b source (343; Figure 3b, column 4), with an asymmetric, right-sided extension into temporal lobe regions. Finally, the distinctive, target-specific, late positivity corresponding to the characteristic midfrontal sink/centroparietal source factor, F – CP + (542; Figure 3b, column 5) was identified. The remaining high-variance component (956; often identified as “slow wave” to reflect the loadings’ time course) represents slow, task-irrelevant variance that is largely attributable to the baseline correction procedure (Section 1.3 of Kayser & Tenke, 2003).