eprintid: 11118
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/11/18
datestamp: 2023-11-10 03:25:40
lastmod: 2023-11-10 03:25:40
status_changed: 2023-11-10 01:14:31
type: article
metadata_visibility: show
creators_name: Yahya, N.
creators_name: Musa, H.
creators_name: Ong, Z.Y.
creators_name: Elamvazuthi, I.
title: Classification of motor functions from electroencephalogram (EEG) signals based on an integrated method comprised of common spatial pattern and wavelet transform framework
ispublished: pub
keywords: Bandpass filters; Brain computer interface; Classification (of information); Electroencephalography; Eye movements; Wavelet transforms, Eigen decomposition; Eigenvalue decomposition; Joint diagonalization; Multiresolution; Oriented energy; Scalogram, Biomedical signal processing, algorithm; electroencephalography; procedures; signal processing; support vector machine; wavelet analysis, Algorithms; Electroencephalography; Signal Processing, Computer-Assisted; Support Vector Machine; Wavelet Analysis
note: cited By 23
abstract: In this work, an algorithm for the classification of six motor functions from an electroencephalogram (EEG) signal that combines a common spatial pattern (CSP) filter and a continuous wavelet transform (CWT), is investigated. The EEG data comprise six grasp-and-lift events, which are used to investigate the potential of using EEG as input signals with brain computer interface devices for controlling prosthetic devices for upper limb movement. Selected EEG channels are the ones located over the motor cortex, C3, Cz and C4, as well as at the parietal region, P3, Pz and P4. In general, the proposed algorithm includes three main stages, band pass filtering, CSP filtering, and wavelet transform and training on GoogLeNet for feature extraction, feature learning and classification. The band pass filtering is performed to select the EEG signal in the band of 7 Hz to 30 Hz while eliminating artifacts related to eye blink, heartbeat and muscle movement. The CSP filtering is applied on two-class EEG signals that will result in maximizing the power difference between the two-class dataset. Since CSP is mathematically developed for two-class events, the extension to the multiclass paradigm is achieved by using the approach of one class versus all other classes. Subsequently, continuous wavelet transform is used to convert the band pass and CSP filtered signals from selected electrodes to scalograms which are then converted to images in grayscale format. The three scalograms from the motor cortex regions and the parietal region are then combined to form two sets of RGB images. Next, these RGB images become the input to GoogLeNet for classification of the motor EEG signals. The performance of the proposed classification algorithm is evaluated in terms of precision, sensitivity, specificity, accuracy with average values of 94.8, 93.5, 94.7, 94.1, respectively, and average area under the receiver operating characteristic (ROC) curve equal to 0.985. These results indicate a good performance of the proposed algorithm in classifying grasp-and-lift events from EEG signals. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
date: 2019
publisher: MDPI AG
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85074645918&doi=10.3390%2fs19224878&partnerID=40&md5=6394dea6bdda01d7a360c26621b5e5dc
id_number: 10.3390/s19224878
full_text_status: none
publication: Sensors (Switzerland)
volume: 19
number: 22
refereed: TRUE
issn: 14248220
citation:   Yahya, N. and Musa, H. and Ong, Z.Y. and Elamvazuthi, I.  (2019) Classification of motor functions from electroencephalogram (EEG) signals based on an integrated method comprised of common spatial pattern and wavelet transform framework.  Sensors (Switzerland), 19 (22).   ISSN 14248220