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Brain Signal AnalysisAdvances in Neuroelectric and Neuromagnetic Methods$
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Todd C. Handy

Print publication date: 2009

Print ISBN-13: 9780262013086

Published to MIT Press Scholarship Online: August 2013

DOI: 10.7551/mitpress/9780262013086.001.0001

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Reverse Correlation and the VESPA Method

Reverse Correlation and the VESPA Method

(p.1) 1 Reverse Correlation and the VESPA Method
Brain Signal Analysis

Edmund C. Lalor

Barak A. Pearlmutter

John J. Foxe

The MIT Press

This chapter discusses a method for obtaining a novel visual event-related potential known as the visual evoked spread spectrum analysis (VESPA) that seeks to address the limitations of the standard visual evoked potential (VEP). It introduces the broader reverse correlation technique that has seen widespread use in the analysis of many physiological systems. The chapter describes the VESPA method itself, including the differences between the standard VEP and the VESPA, and some proposed applications and extensions, and shows that VESPA may actually reflect mostly activity of parvocellular pathways. The auditory and visual responses demonstrated in the chapter indicate the utility of the VESPA method in investigation of multisensory integration processes.

Keywords:   VESPA, VEP, parvocellular pathway

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