EEG alpha rhythm detection on a portable device

Made available in DSpace on 2019-10-04T12:39:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-07-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Portable EEG devices have a great potential to become efficient computer interfaces. However, a necessary step is to accurately describe the EEG signal in order to quantify brain rhythms. This study explored two signal analysis techniques, Matching Pursuit (MP) and Fast Fourier Transform (FFT), for differentiation between two states, eyes open (EO) and eyes closed (EC), through the detection of EEG alpha activity obtained from seven scalp regions, using a portable EEG device. Subjects were ten healthy male volunteers. MP results generally reproduced the results from FFT analysis, and all methods performed well on the occipital region. However, there was better state discrimination with MP atom number, and MP atom number was the only variable that reached statistical significance on all locations under study. When employing EEG alpha rhythm for EO vs. EC state discrimination, it may be useful to compute MP atom number, especially when extra-occipital acquisition is warranted. (C) 2019 Elsevier Ltd. All rights reserved. Univ Estadual Paulista, Inst Biosci, Dept Phys & Biophys, Dist Rubido Jr S-N, BR-18618970 Botucatu, SP, Brazil Univ Caxias Do Sul, Ctr Ciencias Exatas & Tecnol, Rua Francisco Getulio Vargas 1130, BR-95001970 Caxias Do Sul, RS, Brazil Hosp Clin Porto Alegre, Neurol Div, Rua Ramiro Barcelos 2350,Sala 2040, BR-90035003 Porto Alegre, RS, Brazil Univ Estadual Paulista, Inst Biosci, Dept Phys & Biophys, Dist Rubido Jr S-N, BR-18618970 Botucatu, SP, Brazil CNPq: 458810/2013-4 CNPq: 181242/2014-1 CNPq: 182472/2015-9 CNPq: 181963/2014-0 CNPq: 185855/2014-8 CNPq: 314178/2014-7 CNPq: 310001/2015-3