Title :
High-resolution ERD: cortical imaging of event-related desynchronization during motor imagery
Author :
Edlinger, G. ; Prull, A. ; Neuper, C. ; Pfurtscheller, G.
Author_Institution :
Dept. of Med. Inf., Tech. Univ. Graz, Austria
fDate :
29 Oct-1 Nov 1998
Abstract :
The objective of this paper is to combine spatially enhanced event-related desynchronization (ERD) data recorded during motor imagery experiments to the anatomy of the brain. Four methods available, the local average reference method (LAR), the surface Laplacian method (LP), the linear estimation method (LE) and the analytical de-blurring method (AD) are applied to the event-related data. All methods yield similar and stable ERD patterns with respect to the location of the maximal desynchronization. The maximal ERD percentage values were found over the contralateral sensorimotor areas of the brain around 625 ms after the presentation of the cue stimulus
Keywords :
biomedical imaging; electroencephalography; 625 ms; EEG linear inverse imaging; analytical deblurring method; brain anatomy; contralateral sensorimotor areas; cortical imaging; cue stimulus; event-related desynchronization; high-resolution ERD; linear estimation method; maximal desynchronization location; medical diagnostic imaging; motor imagery; surface Laplacian method; Biomedical informatics; Electroencephalography; High-resolution imaging; Image reconstruction; Laplace equations; Scalp; Spatial resolution; Spline; Surface reconstruction; Transfer functions;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.747029
