title: Differentiation between finger, toe and tongue movement in man based on 40 Hz EEG.
abstract: Movements of right and left index fingers, right toe and tongue were studied by EEG measurement in the alpha and gamma (30-40 Hz) bands. The EEG was recorded with a 56-electrode array over pre- and postcentral areas. For each movement the average power decrease, as a measurement of the event-related desynchronization or power increase in narrow frequency bands, was calculated. Single-trial data from 8 electrodes, 3 frequency bands and 4 time points within a 1 sec window were subject to a classification task. It was found that, based on single EEG trials, the data from the 4 movements could be differentiated with an accuracy of 70% when alpha and gamma band activity were used but only with 58% in the case of the alpha band activity alone. This shows that the gamma band activity or 40 Hz EEG is strongly related to planning of a specific movement and therefore, improves the accuracy of classification significantly.
authors.affiliation: Ludwig Boltzmann-Institute of Medical Informatics and Neuroinformatics, Graz University of Technology, Austria.
authors.forename: G
authors.initials: G
authors.lastname: Pfurtscheller
authors.forename: D
authors.initials: D
authors.lastname: Flotzinger
authors.forename: C
authors.initials: C
authors.lastname: Neuper
mesh_terms: D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D004569:Electroencephalography; D005385:Fingers / Q000502:physiology; D006801:Humans; D009068:Movement / Q000502:physiology*; D014034:Toes / Q000502:physiology; D014059:Tongue / Q000502:physiology