Wavelet analysis of the EEG during the neurocognitive evaluation of invalidly cued targets

Brain Research
Marcia R DigiacomoCarlos M Gómez

Abstract

In a spatial central cueing paradigm, positions in the horizontal meridian were cued to evaluate the neurocognitive processing of validly (V) and invalidly cued (I) targets. ERPs were obtained from 20 EEG channel recordings. Complex Morlet wavelets were applied for computing event-related spectral power (ERSP) modulations and inter-trial phase coherence (ITC). P3a and P3b responses were increased in a statistically significant manner in I targets with regard to V targets. This increase seems to be generated only by phase resetting without enhancement of spectral power. Comparing ERSP modulations between I and V target trials we found a major effect centred in the alpha range. The following results were obtained for invalid condition in relation to valid condition: 6-12Hz ERSP decrease topographically widespread over the scalp, starting around 450 ms and peaking around 650 ms; 10-14Hz ERSP increase peaking around 200 ms at fronto-central electrodes; and 10-14Hz ERSP decrease occurring from 400 to 600 ms at posterior electrodes. Therefore, the invalidity effect indeed produces salient changes in the stimulus related and ongoing neuronal activity leading to a brain state of comparative higher activity both excitatory and inhibitor...Continue Reading

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Citations

Jan 19, 2010·Brain Research Bulletin·Angélica B FloresSusana Meneres
Sep 29, 2011·British Journal of Clinical Pharmacology·Carina GraversenAsbjørn M Drewes
Jul 5, 2015·Behavioral and Brain Functions : BBF·María Ángeles Rojas-BenjumeaCarlos M Gómez
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May 7, 2016·The European Journal of Neuroscience·Dawei ShenClaude Alain
Nov 28, 2017·Reviews in the Neurosciences·Carlos M GómezJaime Gómez-González

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