Artif Intell Med - Development of electroencephalographic pattern classifiers for real and imaginary thumb and index finger movements of one hand.

Tópicos

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Resumo

JECTIVE: This study aimed to find effective approaches to electroencephalographic (EEG) signal analysis and resolve problems of real and imaginary finger movement pattern recognition and categorization for one hand.METHODS AND MATERIALS: Eight right-handed subjects (mean age 32.8 [SD=3.3] years) participated in the study, and activity from sensorimotor zones (central and contralateral to the movements/imagery) was recorded for EEG data analysis. In our study, we explored the decoding accuracy of EEG signals using real and imagined finger (thumb/index of one hand) movements using artificial neural network (ANN) and support vector machine (SVM) algorithms for future brain-computer interface (BCI) applications.RESULTS: The decoding accuracy of the SVM based on a Gaussian radial basis function linearly increased with each trial accumulation (mean: 45%, max: 62% with 20 trial summarizations), and the decoding accuracy of the ANN was higher when single-trial discrimination was applied (mean: 38%, max: 42%). The chosen approaches of EEG signal discrimination demonstrated differential sensitivity to data accumulation. Additionally, the time responses varied across subjects and inside sessions but did not influence the discrimination accuracy of the algorithms.CONCLUSION: This work supports the feasibility of the approach, which is presumed suitable for one-hand finger movement (real and imaginary) decoding. These results could be applied in the elaboration of multiclass BCI systems.

Resumo Limpo

jectiv studi aim find effect approach electroencephalograph eeg signal analysi resolv problem real imaginari finger movement pattern recognit categor one handmethod materi eight righthand subject mean age sd year particip studi activ sensorimotor zone central contralater movementsimageri record eeg data analysi studi explor decod accuraci eeg signal use real imagin finger thumbindex one hand movement use artifici neural network ann support vector machin svm algorithm futur braincomput interfac bci applicationsresult decod accuraci svm base gaussian radial basi function linear increas trial accumul mean max trial summar decod accuraci ann higher singletri discrimin appli mean max chosen approach eeg signal discrimin demonstr differenti sensit data accumul addit time respons vari across subject insid session influenc discrimin accuraci algorithmsconclus work support feasibl approach presum suitabl onehand finger movement real imaginari decod result appli elabor multiclass bci system

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