Comput Math Methods Med - The difference of brain functional connectivity between eyes-closed and eyes-open using graph theoretical analysis.

Tópicos

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Resumo

To study the differences in functional brain networks between eyes-closed (EC) and eyes-open (EO) at resting state, electroencephalographic (EEG) activity was recorded in 21 normal adults during EC and EO states. The synchronization likelihood (SL) was applied to measure correlations between all pairwise EEG channels, and then the SL matrices were converted to graphs by thresholding. Graphs were measured by topological parameters in theta (4-7Hz), alpha (8-13Hz), and beta (14-30Hz) bands. By changing from EC to EO states, mean cluster coefficients decreased in both theta and alpha bands, but mean shortest path lengths became shorter only in the alpha band. In addition, local efficiencies decreased in both theta and alpha bands, while global efficiencies in the alpha band increased inversely. Opening the eyes decreased both nodes and connections in frontal area in the theta band, and also decreased those in bilateral posterior areas in the alpha band. These results suggested that a combination of the SL and graph theory methods may be a useful tool for distinguishing states of EC and EO. The differences in functional connectivity between EC and EO states may reflect the difference of information communication in human brain.

Resumo Limpo

studi differ function brain network eyesclos ec eyesopen eo rest state electroencephalograph eeg activ record normal adult ec eo state synchron likelihood sl appli measur correl pairwis eeg channel sl matric convert graph threshold graph measur topolog paramet theta hz alpha hz beta hz band chang ec eo state mean cluster coeffici decreas theta alpha band mean shortest path length becam shorter alpha band addit local effici decreas theta alpha band global effici alpha band increas invers open eye decreas node connect frontal area theta band also decreas bilater posterior area alpha band result suggest combin sl graph theori method may use tool distinguish state ec eo differ function connect ec eo state may reflect differ inform communic human brain

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