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- Title
Short-lived brain state after cued motor imagery in naive subjects.
- Authors
Pfurtscheller, G.; Scherer, R.; Müller‐Putz, G. R.; Lopes da Silva, F. H.
- 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 ∼300 ms after the cue onset and lasting for less than 1 s.
- Subjects
ELECTROENCEPHALOGRAPHY; VISUAL evoked response; EVOKED potentials (Electrophysiology); BRAIN function localization; NEUROSCIENCES
- Publication
European Journal of Neuroscience, 2008, Vol 28, Issue 7, p1419
- ISSN
0953-816X
- Publication type
Article
- DOI
10.1111/j.1460-9568.2008.06441.x