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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Evaluation of cognitive ERP, ERD/ERS from intracerebral electrodes during the testing of executive functions, the time – frequency analysis
 Chládek, Jan ; Bočková, M. ; Halámek, Josef ; Jurák, Pavel ; Nestrašil, I. ; Rektor, I.
In the present paper we describe the procedure of evaluation repeated EEG signals obtained from deep brain structures. Data are processed using the time-frequency analysis, which helps to determine individual frequency (IF) bands and afterwards are processed using complex demodulation technique to assess power envelope of IF band. We analysed phase-locked (Event-Related Potentials) and non-phase-locked (Event Related De/Synchronisation) signals obtained during different task conditions. Because of low signal to noise ratio, statistical tests of credibility and significance were used.
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Vyhodnocení ERD/ERS: vyhodnocení latence pomocí plovoucího okna
 Chládek, Jan ; Nestrašil, I. ; Jurák, Pavel ; Halámek, Josef ; Bareš, M. ; Rektor, I.
Event Related Synchronization/Desynchronization is among others characterized by amplitude and latency. Latency determination depends on the type of evaluation method and its parameters. Therefore its detection can be multiple-valued. To avoid the incorrect latency detection the analysis using smoothing floating window with different widths was employed
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