Comparing common average referencing to laplacian referencing in detecting imagination and intention of movement for brain computer interface

Syahrull Hi Fi Syam, Heba Lakany, R. B. Ahmad, Bernard A. Conway

Research output: Contribution to journalArticle

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Abstract

Brain-computer interface (BCI) is a paradigm that offers an alternative communication channel between neural activity generated in the brain and the user's external environment. This paper investigates detection of intention of movement from surface EEG during actual and imagination of movement which is essential for developing non-invasive BCI system for neuro-impaired patients. EEG signal was recorded from 11 subjects while imagining and performing right wrist movement in multiple directions using 28 electrodes based on international 10-20 standard electrode placement locations. The recorded EEG signal later was filtered and pre-processed by spatial filter namely; Common average reference (CAR) and Laplacian (LAP) filter. Features were extracted from the filtered signal using ERSP and power spectrum and classified by k-nearest neighbour (k-NN) and quadratic discriminant analysis (QDA) classifiers. The classification results show that LAP filter has outperformed CAR with respect to classification. Classification accuracy ranged from 63.33% to 100% for detection of imagination of movement and 60% to 96.67% for detection of intention of actual movement. In both of detection of imagination and intention of movement k-NN classifier gave better result compared to QDA classifier.

Original languageEnglish
Article number01028
Number of pages7
JournalMATEC Web of Conferences
Volume140
DOIs
Publication statusPublished - 11 Dec 2017

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Brain computer interface
Electroencephalography
Classifiers
Discriminant analysis
Electrodes
Power spectrum
Brain

Keywords

  • brain computer interface
  • common average referencing
  • laplacian referencing

Cite this

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abstract = "Brain-computer interface (BCI) is a paradigm that offers an alternative communication channel between neural activity generated in the brain and the user's external environment. This paper investigates detection of intention of movement from surface EEG during actual and imagination of movement which is essential for developing non-invasive BCI system for neuro-impaired patients. EEG signal was recorded from 11 subjects while imagining and performing right wrist movement in multiple directions using 28 electrodes based on international 10-20 standard electrode placement locations. The recorded EEG signal later was filtered and pre-processed by spatial filter namely; Common average reference (CAR) and Laplacian (LAP) filter. Features were extracted from the filtered signal using ERSP and power spectrum and classified by k-nearest neighbour (k-NN) and quadratic discriminant analysis (QDA) classifiers. The classification results show that LAP filter has outperformed CAR with respect to classification. Classification accuracy ranged from 63.33{\%} to 100{\%} for detection of imagination of movement and 60{\%} to 96.67{\%} for detection of intention of actual movement. In both of detection of imagination and intention of movement k-NN classifier gave better result compared to QDA classifier.",
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Comparing common average referencing to laplacian referencing in detecting imagination and intention of movement for brain computer interface. / Syam, Syahrull Hi Fi; Lakany, Heba; Ahmad, R. B.; Conway, Bernard A.

In: MATEC Web of Conferences, Vol. 140, 01028, 11.12.2017.

Research output: Contribution to journalArticle

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