Magnitude Squared of Coherence to Detect ImaginaryMovement

Magnitude Squared of Coherence to Detect ImaginaryMovement

Author Santos Filho, Sady Antonio Google Scholar
Tierra-Criollo, Carlos Julio Google Scholar
Souza, Ana Paula Google Scholar
Silva Pinto, Marcos Antonio Google Scholar
Cunha Lima, Maria Luiza Google Scholar
Manzano, Gilberto Mastrocola Autor UNIFESP Google Scholar
Institution Universidade Federal de Minas Gerais (UFMG)
Universidade Federal de São Paulo (UNIFESP)
Abstract This work investigates the Magnitude Squared of Coherence (MSC) for detection of Event Related Potentials (ERPs) related to left-hand index finger movement. Initially, ERP presence was examined in different brain areas. To accomplish that, 20 EEG channels were used, positioned according to the 10-20 international system. the grand average, resulting from 10 normal subjects showed, as expected, responses at frontal, central, and parietal areas, particularly evident at the central area (C3, C4, Cz). the MSC, applied to movement imagination related EEG signals, detected a consistent response in frequencies around 0.3-1 Hz (delta band), mainly at central area (C3, Cz, and C4). Ability differences in control imagination among subjects produced different detection performance. Some subjects needed up to 45 events for a detectable response, while for some others only 10 events proved sufficient. Some subjects also required two or three experimental sessions in order to achieve detectable responses. for one subject, response detection was not possible at all. However, due to brain plasticity, it is plausible to expect that training sessions (to practice movement imagination) improve signal-noise ratio and lead to better detection using MSC. Results are sufficiently encouraging as to suggest further exploration of MSC for future BCI application. Copyright (C) 2009 Sady Antonio Santos Filho et al.
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Date 2009-01-01
Published in Eurasip Journal On Advances in Signal Processing. New York: Hindawi Publishing Corporation, 12 p., 2009.
ISSN 1687-6172 (Sherpa/Romeo, impact factor)
Publisher Hindawi Publishing Corporation
Extent 12
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000270479300001

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