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Short-lived brain state after cued motor imagery in naive subjects

Short-lived brain state after cued motor imagery in naive subjects

Authors :
Gert Pfurtscheller
Gernot Müller-Putz
Reinhold Scherer
F.H. Lopes da Silva
Cognitive and Systems Neuroscience (SILS, FNWI)
Source :
European Journal of Neuroscience, 28(7), 1419-1426. Wiley-Blackwell
Publication Year :
2008

Abstract

Multi-channel electroencephalography recordings have shown that a visual cue, indicating right hand, left hand or foot motor imagery, can induce a short-lived brain state in the order of about 500 ms. In the present study, 10 able-bodied subjects without any motor imagery experience (naive subjects) were asked to imagine the indicated limb movement for some seconds. Common spatial filtering and linear single-trial classification was applied to discriminate between two conditions (two brain states: right hand vs. left hand, left hand vs. foot and right hand vs. foot). The corresponding classification accuracies (mean +/- SD) were 80.0 +/- 10.6%, 83.3 +/- 10.2% and 83.6 +/- 8.8%, respectively. Inspection of central mu and beta rhythms revealed a short-lasting somatotopically specific event-related desynchronization (ERD) in the upper mu and/or beta bands starting approximately 300 ms after the cue onset and lasting for less than 1 s.

Details

ISSN :
0953816X
Volume :
28
Issue :
7
Database :
OpenAIRE
Journal :
European Journal of Neuroscience
Accession number :
edsair.doi.dedup.....4ef475542ae6fe7dfb7cb2958b1d32d8
Full Text :
https://doi.org/10.1111/j.1460-9568.2008.06441.x