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Extracting information from the shape and spatial distribution of evoked potentials.

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journal contribution
posted on 24.04.2018, 14:39 by Vítor Lopes-Dos-Santos, Hernan G. Rey, Joaquin Navajas, Rodrigo Quian Quiroga
BACKGROUND: Over 90 years after its first recording, scalp electroencephalography (EEG) remains one of the most widely used techniques in human neuroscience research, in particular for the study of event-related potentials (ERPs). However, because of its low signal-to-noise ratio, extracting useful information from these signals continues to be a hard-technical challenge. Many studies focus on simple properties of the ERPs such as peaks, latencies, and slopes of signal deflections. NEW METHOD: To overcome these limitations, we developed the Wavelet-Information method which uses wavelet decomposition, information theory, and a quantification based on single-trial decoding performance to extract information from evoked responses. RESULTS: Using simulations and real data from four experiments, we show that the proposed approach outperforms standard supervised analyses based on peak amplitude estimation. Moreover, the method can extract information using the raw data from all recorded channels using no a priori knowledge or pre-processing steps. COMPARISON WITH EXISTING METHOD(S): We show that traditional approaches often disregard important features of the signal such as the shape of EEG waveforms. Also, other approaches often require some form of a priori knowledge for feature selection and lead to problems of multiple comparisons. CONCLUSIONS: This approach offers a new and complementary framework to design experiments that go beyond the traditional analyses of ERPs. Potentially, it allows a wide usage beyond basic research; such as for clinical diagnosis, brain-machine interfaces, and neurofeedback applications requiring single-trial analyses.

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Citation

Journal of Neuroscience Methods, 2018, 296, pp. 12-22

Author affiliation

/Organisation/COLLEGE OF LIFE SCIENCES/Biological Sciences/Neuroscience, Psychology and Behaviour

Version

VoR (Version of Record)

Published in

Journal of Neuroscience Methods

Publisher

Elsevier

issn

0165-0270

eissn

1872-678X

Acceptance date

21/12/2017

Copyright date

2017

Available date

24/04/2018

Publisher version

https://www.sciencedirect.com/science/article/pii/S0165027017304338?via=ihub#!

Language

en

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