Quantification of movement-related modulation on beta activity of single-trial magnetoencephalographic measurement using independent component analysis (ICA)

Yu Te Wu, Po Lei Lee, Li Fen Chen, Tzu Chen Yeh, Jen Chuen Hsieh, Low Tone Ho

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

An ICA-based method is proposed to quantify the single-trial response of beta-band activities of sensorimotor rhythm in the right index finger lifting task. The magnetic fields of four right-handed subjects (2 males and 2 females) were recorded by a whole-head magnetoencephalography. ICA was applied to separate each rhythmic epoch into temporally independent components by means of an un-mixing matrix. According to the temporal and spatial characteristics of the decomposed components, task-related ones are selected for data reconstruction. Compared with the conventional Amplitude Modulation (AM) method with 100 averaged trials, the ICA-based method not only preserved the trial-by-trial variabilities of rhythmic activities, but also significantly improves the decreased amplitudes in event-related desynchronization (ERD) and the rebounds in event-related synchronization (ERS).

Original languageEnglish
Title of host publicationConference Proceedings - 1st International IEEE EMBS Conference on Neural Engineering
EditorsLaura J. Wolf, Jodi L. Strock
PublisherIEEE Computer Society
Pages396-398
Number of pages3
ISBN (Electronic)0780375793
DOIs
StatePublished - 2003
Event1st International IEEE EMBS Conference on Neural Engineering - Capri Island, Italy
Duration: 20 Mar 200322 Mar 2003

Publication series

NameInternational IEEE/EMBS Conference on Neural Engineering, NER
Volume2003-January
ISSN (Print)1948-3546
ISSN (Electronic)1948-3554

Conference

Conference1st International IEEE EMBS Conference on Neural Engineering
Country/TerritoryItaly
CityCapri Island
Period20/03/0322/03/03

Keywords

  • Biomedical imaging
  • Fingers
  • Frequency synchronization
  • Hospitals
  • Independent component analysis
  • Laboratories
  • Magnetic modulators
  • Magnetic sensors
  • Magnetic separation
  • Magnetic shielding

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