INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION

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ERFANI ALI; ERFANIAN ABBAS

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Seminar Paper

Paper Information

Seminar: IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING
Year:2004 | Issue:11

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Title

INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION

Author(s)

ERFANI ALI | ERFANIAN ABBAS

Keywords

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Abstract

THIS ARTICLE PRESENTS THE USE OF INDEPENDENT COMPONENT ANALYSIS (ICA) TO CHARACTERIZE THE CHANGES OF EEG SIGNALS DURING IMAGINING HAND CLOSING, HAND OPENING, AND DURING A RESTING STATE. ICA IS A USEFUL EXTENSION OF THE PRINCIPLE COMPONENT ANALYSIS (PCA) THAT ALLOWS BLIND SEPARATION OF SOURCES, LINEARLY MIXED, ASSUMING ONLY THE STATISTICAL INDEPENDENCE OF THESE SOURCES. THIS SUGGESTS THAT ICA CAN SEPARATE DIFFERENT INDEPENDENT BRAIN ACTIVITIES DURING MOTOR IMAGERY INTO SEPARATE COMPONENTS. FOR THIS PURPOSE, DIFFERENT EXPERIMENTS WERE CONDUCTED ON NORMAL SUBJECTS. THE EEG SIGNALS WERE RECORDED AT A SAMPLING RATE OF 256 BY SCALP ELECTRODES PLACED ACCORDING TO THE INTERNATIONAL 10-20 SYSTEM. ANOTHER CHANNEL WAS ADDED TO RECORD EYE BLINKS BY PLACING AN ELECTRODE ON THE FOREHEAD ABOVE THE LEFT BROW LINE. THE RESULTS SHOW THAT THE VISUAL STIMULUS RESPONSE, P300 COMPONENT, MOTOR IMAGERY POTENTIAL, AND BACKGROUND EEG COMPONENTS CAN BE SEPARATED BY THE INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION. TIME FREQUENCY ANALYSIS OF THE INDEPENDENT COMPONENT OF THE EEG SIGNAL SHOWS THAT THE POWER OF ALPHA BAND IS DECREASED DURING MOTOR IMAGERY. THE RATE OF DECREASE DURING HAND CLOSING IS MORE THAN THAT DURING OPENING. MOREOVER, THE BEGINNING OF MOTOR IMAGINATION IS ACCOMPANIED BY AN INCREASE OF DELTA AND TETA BAND POWER.

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APA: Copy

ERFANI, ALI, & ERFANIAN, ABBAS. (2004). INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION. IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. SID. https://sid.ir/paper/906386/en

Vancouver: Copy

ERFANI ALI, ERFANIAN ABBAS. INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION. 2004. Available from: https://sid.ir/paper/906386/en

IEEE: Copy

ALI ERFANI, and ABBAS ERFANIAN, “INDEPENDENT COMPONENT ANALYSIS OF EEG SIGNALS DURING HAND MOVEMENT IMAGINATION,” presented at the IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. 2004, [Online]. Available: https://sid.ir/paper/906386/en

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