tailieunhanh - Báo cáo hóa học: "Research Article A Method for Visualizing Independent Spatio-Temporal Patterns of Brain Activity"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Method for Visualizing Independent Spatio-Temporal Patterns of Brain Activity | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 948961 6 pages doi 2009 948961 Research Article A Method for Visualizing Independent Spatio-Temporal Patterns of Brain Activity Dean J. Krusienski School of Engineering University of North Florida 1 UNF Drive Jacksonville FL 32224 USA Correspondence should be addressed to Dean J. Krusienski deankrusienski@ Received 2 January 2009 Accepted 31 May 2009 Recommended by Don Johnson Evoked and coordinated brain signals often exhibit distinct individualized spatial and temporal characteristics such as amplitude and phase couplings across and within spatial channels. In the study of these brain potentials it is important to characterize both the spatial and temporal morphologies of the responses for a better understanding of both the physiology and function of the brain. This paper presents a method for visualizing the characteristic spatio-temporal brain activity associated with two distinct conditions. This method called Independent Spatio-Temporal Patterns ISTPs extends Common Spatial Patterns CSPs for spatio-temporal pattern visualization by adding temporal features. Independent component analysis ICA is then applied to extract independent spatio-temporal patterns corresponding to each condition. The results indicate that the inclusion of temporal features can provide useful insight regarding the spatio-temporal characteristics of sensorimotor rhythms. Copyright 2009 Dean J. Krusienski. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Evoked and coordinated brain signals often exhibit distinct individualized spatial and temporal characteristics such as amplitude and phase couplings across and within spatial channels 2 . In the study of these brain potentials it is important to

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