[esnr] Re: abst eeg global changes

  • From: Marco Congedo <loretabiofeedback@xxxxxxxxx>
  • To: esnr@xxxxxxxxxxxxx
  • Date: Mon, 18 Oct 2004 04:00:12 -0700 (PDT)

I read it months ago. It is not that good as the title promises....(my opinion).

JefCrotty@xxxxxx wrote:

IEEE Trans Neural Syst Rehabil Eng. 2003 Jun;11(2):133-7. 
EEG changes accompanying learned regulation of 12-Hz EEG activity. 

Delorme A, Makeig S. 

Swartz Center for Computational Neuroscience, Institute for Neural Computation, 
University of California at San Diego, La Jolla 92093-0961, USA. arno@xxxxxxxx 

We analyzed 15 sessions of 64-channel electroencephalographic (EEG) data 
recorded from a highly trained subject during sessions in which he attempted to 
regulate power at 12 Hz over his left- and right-central scalp to control the 
altitude of a cursor moving toward target boxes placed at the top-, middle-, or 
bottom-right of a computer screen. We used infomax independent component 
analysis (ICA) to decompose 64-channel EEG data from trials in which the 
subject successfully up- or down-regulated the measured EEG signals. Applying 
time-frequency analysis to the time courses of activity of several of the 
resulting 64 independent EEG components revealed that successful regulation of 
the measured activity was accompanied by extensive, asymmetrical changes in 
power and coherence, at both nearby and distant frequencies, in several parts 
of cortex. A more complete understanding of these phenomena could help to 
explain the nature and locus of learned regulation of EEG rhythms and migh
 t also
 suggest ways to further optimize the performance of brain-computer interfaces. 

Marco Congedo, PhD 
National Institute for Research in Informatics and Automated Systems 
Tel: +33 4 76615409

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