EEG event-related potentials in preparation, planning and execution of arm isometric exertions, localized by surface Laplacian.

Bahman Nasseroleslami, Heba Lakany, Bernard A. Conway

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

Noninvasive electroencephalographic (EEG) recordings have been successfully used to study motor-related brain activity in humans. We recently used an instruction delay paradigm to investigate the EEG signatures associated with preparation, planning and execution of arm isometric exertions. Subjects (n=8), prepared, planned and exerted force with their right arm in horizontal plane, according to visual cues. Here we show that surface Laplacian, as a simple spatial filter can provide useful knowledge about the involved brain regions in different stages of the task. The results show that there is a negative peak at FCz in response to the preparation cue. The planning cue causes positive peaks at FCz and Pz followed by a sustained negativity at FCz. The GO cue leads to a a negative peak at FCz and a positive peak at Pz which is followed by a sustained positivity at C1. The results suggest that there is considerable involvement of pre-motor and parietal areas in different stages of motor preparation, planning and execution of isometric tasks. The results provide considerably local information on brain activity compared to ear-lobe referenced event-related potentials and favor the applicability of non-invasive EEG recordings and techniques to study motor neurophysiology when appropriately used in complex experimental setups. This can be of interest for different diagnostic and clinical applications and for linking the signatures of brain activity in different neuro-imaging modalities e.g. EEG and fMRI.
Original languageEnglish
Title of host publication2013 6th International IEEE/EMBS Conference on Neural Engineering (NER)
Place of PublicationPiscataway
PublisherIEEE
Pages761-764
Number of pages4
ISBN (Print)9781467319676
DOIs
Publication statusPublished - 6 Jan 2014
Event6th International IEEE/EMBS Conference on Neural Engineering - Sheraton San Diego Hotel & Marina, San Diego, United States
Duration: 6 Nov 20138 Nov 2013
http://www.ieee.org/conferences_events/conferences/conferencedetails/index.html?Conf_ID=19964

Publication series

NameInternational IEEE/EMBS Conference on Neural Engineering [Proceedings]
PublisherIEEE
ISSN (Print)1948-3546

Conference

Conference6th International IEEE/EMBS Conference on Neural Engineering
Abbreviated titleNER 2013
CountryUnited States
CitySan Diego
Period6/11/138/11/13
Internet address

Keywords

  • noninvasive electroencephalographic
  • eeg
  • brain activity
  • visualization
  • Laplace equations
  • electric potential
  • motor neurophysiology

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